Release bearing not working as it should????

I had problems with original clutch not being able to engage gear so as advice on here folk said it could be seized release lever so had to take the box out so just as well to replace the whole clutch assembly, and as had problems with hydraulics before so covered all angles to make sure and fitted a sheddist kit,when the box was out the oem release bearing was pretty rough and the lever was sticky so thought I had that sorted by new bearing and really giving the arm a good clean and re grease was working fine, put the box back in and tried the lever arm seemed fine installed the sheddist kit bled it as described.So while car was up in the air was wanting a De-cat pipe as supplied by Goldie but damaged the o2 sensor on the manifold getting the original cat out !!!! seized bolts so angle grinder slipped hence new o2 sensor ,which all took a good few weeks to get all back together and to try the clutch out proper like ..... and now this .....
Thanks guys for the great helpful comments as always .... but as someone said somebody somewhere doesn't want my ZS back on the road !!! been along time ..just taken strong pain killers for the back and I'm away to have a large dram to numb the pain and the broken heart !!!! cheers ....

Did you install the release bearing correctly? Possibly holding the clutch off? Also are the driveshafts installed correctly right into the box? Or perhaps a broken cv, although i'd expect to see something

Think I installed everything correctly it's just like the clutch is engaged all the time as I said earlier the gears go in without depressing the clutch and the drive shafts turn ok ..... stumped ..

Check if when assembled, the pin for the slave cylinder is the same total length as the old slave because it could be a touch longer and always engaging the clutch.

When I fitted the Toyota hydraulics to my Rover, I thought I did something wrong because I would start pulling away and then once the engine gave some torque, it would rev freely as if I pressed the clutch. After a bunch of different things tried, I took out the pin, shaved 2 mm off of it and set it in again and it was back to normal.

Check this because it might just be something as simple as that. If it is the case, take out the pin from the slave cylinder, shave off 1mm at a time until it starts feeling better but dont go past 3-4mm.

Good luck with getting her back on the road and take care of the back!

Update.. well took the gearbox out and the release bearing is fine and moving freely but when I took the pressure plate off the clutch plate was stuck to the pressure plate and separated the clutch plate and its like slight rusty marks and an imprint of the clutch plate on the face of the pressure plate !!!!!!! Has anybody got any ideas as to this ?? was hoping it was just the release bearing but now ..not a clue ,Have checked to make sure it's the right clutch for the 180 ..details are Valeo no: 700690 MC-5 pressure plate and clutch plate no:689109 240613 / 07 46 <246> L2 .. Anybody got suggestions or had similar problems !!! would be truly grateful for advice ..... Thanks Again

Take it back mate

Just had a look on Valeo Service, the part number for the 3 piece kit for a 180 is 826549.

Yeah Pete just checked my invoice from the motor factor : Product code VAC826549 Clutch kit MG ZS 2.5 V6 .. so it's the right clutch kit ... and Goldie Quote on invoice (all goods have to be returned within 30 days of sale date for a full credit ) .. So that's that donald ducked . So don't know what else to try or do totally stumped and desperate!!

Is the gearbox deffo okay?