poor service

i walked in to a store to make a purchase to my unpleasant surprise my 8 years rcs account was closed , without my authorisation/consent i looked like a fool when i tried purchasing then the card kept on declining,RCS has no right to close my account without my authorisation at first it was ripping us with interest rate not its closing customers without their consent this is not acceptable,i am asking myself it my account was not fully paid where they going to damn close it no they were going to call me every month to tell me to pay it,why didn't they call me and check with me if m still interested in the account rather than just closing it this is really bull hey i want my account to be re-instated effective immediately. ***