RCS treating me like a ********

I have app**** for a builders card via RCS and it was approved after I sent three months payslips and other documents. I was approved for R20000 and was asked to come to the Builders store to collect the card. The people at the store struggled to link the approved amount to a card and kept on changing cards trying to link them. A week later I try to make a purchase and I am told the account was linked to a different card. The builders store called RCS to issue a new card at builders cost and RCS send the query to ***** department and made me sit in the shop for four hours without any help.The made me sign a document three times and asked me endless questions and eventually asked me to resent bank statements, salary slips and proof of residence which I already sent less than a two weeks ago. I am refusing to be treated like a ******** by them based on their racial profiling mechanism and failure to take responsibility for their mess up. I was supposed to start a building project soon and it is now delayed because of their incompetence and disrespect for customers. If they dont issue a card they must close my account.