DEBIT ORDER ISSUES

DEBIT ORDER ISSUES - I have changed banking details in February 2022. I have communicated this to Telkom Mobile however this was not effected. I have been charged R202 per month for each month as unsuccessful collection even though payments are done via eft. I have requested refund of the additional fees paid and for bank changes to be effected. Its concerning that no one can assist in resolving my issue and no one is able to assist me further on this issue.