CellC does not disappoint to deliver BAD service

This is not the first time I have made my frustrations known about trying to deal with CellC. Last year I returned 2 x laptops that were faulty and canceled both contracts, but since July 2023 Cellc has been debiting my account with R540 every month because only 1 contract was canceled, although they confirmed receipt of both laptops and cancellations. I have now been told that I must contact the CellC ***** department to report Cellc to Cellc. I do not understand why. I have to on top of all the emails phone calls and visits to the Cellc store fill in a form and supply documents and proof of my complaint, everything they have on their systems in front of them. FNB is now refusing to return the last debit order of R1025 done on 30/12/23. What does one have to resort to getting them to stop deducting money for a canceled contract?