poor service from call centre

I contacted MFC and I spoke to nonkululek , thokozile, John, zandi and as well as lebo the supervisor and when I explained to them that they are still debiting my account and my contract with MFC expired in December they told me that they will amend the policy and car killos so that they will pay service for the last time because they were not supposed to debit the account from January till date since contract expired and they placed me on hold for 10 minutes and when the came back they promised to call me back after 30 minutes since Friday but they never d'd and I called them again and they said they will cancel the policy since it expired and they will refund me which they never d'd and now when I call they put me on hold for ever. I regret the day I took a contract with MFC and I wil never do bt I want my money and my airtime I was using to call. This call centre service was very bad.