Is natwest.co.uk Safe?

natwest suggested I moved my ISA savings to a 'better rate account' without warning me of the irreversible damage this would do to my savings. i could not then put it back into an ISA, when I realised the rate wasn't so great anyway. they refused to take any blame for this at all, and gave me nothing. when i went to the bank to cancel the guy was filling out the online cancelling forms, and just skipping through the form - just putting n/a in every box. I pointed out that actually I would like to give a reason for cancelling! He was shocked. it's obvious that they are trained just to do everything quickly without any care for customer service. just writing this makes me so angry i am going to have to stop now. anyway, still receiving emails/letters etc. I HATE NATWEST NATWEST IS APPALLING