Ignored by RCS call center.

Since last year November I've laid an complaint about my lost credit credit card and the credit card call center line was closed the whole December then they opened and did deliver my card now I've spent almost 100 worth of airtime trying to activate my card they have been sending me up and down even hiding their supervisor for me to speak to him. It's very disrespectful what they did and till to date I'm paying credit card that I can not use... Please help