Faults sales complaint

In March I signed a contract for 12 months with ignite here in town and I signed up for R350 a month with a guy named abdulagman however since then ignite has been debiting R455 from my account and they are aware of this matter but they doing nothing about it I told them it’s either the R350 or they cancel the contract and I can go sign somewhere else and it’s an inconvenience having to go to the bank to reverse these direct debits and the failed direct debit bank charges as well . And I still have to call them with my own airtime they wana transfer you to different departments instead of taking my number to call back it’s stressful time consuming and money wasting