poor service and negligencen

I have been calling many times requesting a letter to confirm to the bank that there is no debit order scheduled under my profile with RCS group for my Queenspark account and I pay manually every month. i phoned an agent Asanda promised that her manager will send the letter till today. my bank is frustrating me worse as they insist i get proof that indeed this might be ***** for them to investigate further.

I now start to doubt if the story of not having a debit order exists. im fed up calling RCS group and requesting the bank to reverse debits , its frustrating.