RCS PnP store account - poor service!!! account blocked!

You guys don't even deserve 1 star!!!! Today my mother had the worst experience dealing with RCS trying to resolve the issue with her Pick n Pay store account. She's been having issues with her card several times in the past. When she went to Pick n Pay hypermarket in Ottery to purchase a few items using her store card the card would swipe. The cashier told her it may be an issue with her magnetic strip and that the card would need to be replaced. She was put on the phone to the RCS call centre to have her credit transferred to her new card, she spent 3 hours on the phone being asked multiple questions, the issue the came that she no longer has access to the phone number or the email address that was used when the opened the account when she tried to explain that to the person she spoke to at the call centre she was treated like some type of *******, the manager of the store also tried to help the call centre agent understand that all the other details my mother was verifying was correct just that she no longer has the phone number they were sending the OTP to and that she cannot remember the email address that was used to open the account the call centre agent refused to assist my mother and the store manger any further and proceeded to block her account. my mother was left quite upset and a little traumatised by the incident and left the store without the groceries that she went there to by snd was given her new smart shopper card with her credit facility no being available to her. The lady at the store tried to assist as best she could but ultimately the issue now lies with RCS. This needs to be rectified ASAP!!! If not we will be lodging a formal complaint complaint with all the necessary regulatory bodies. RCS you need to do better!!!