Poor Service form RCS

There was ******* online activity on my RCS Store Card during May 2022. I contacted the RCS call centre to report it and my card was stopped. I was transferred to the ***** department, but waited on the line for approximately 1 hour without my call being answered. I tried contacting them again on several occasions, but still my call was not answered on any of my calls which left me with no airtime!!!!. I again contacted them on 28 May 2002 and refused to be put on hold again or transferred to a department who simply don't bother in answering calls and requested to speak to a supervisor or manager. I was informed that she (the supervisor) was on another call and would call me back SHORTLY. It is now the 29th of May and still no call-back was received by me. I urgently need to use my card, but since it is now blocked, I can't make any purchases. I don't know what the next step is to get this matter resolved, get my card unblocked or get a new card and have the ******* transactions reversed. I also suddenly get SMS notifications for an RCS card which do not belong to me. This is rather worrisome and extremely frustrating.