Bad service on my contract

I phoned telkom mid October to request or them to change my debit date because I have changed jobs. The lady that was assisting me told me all has been changed. In September I saw that I wasn't billed so I phone and the lady confirmed that they didn't get money on my bank. I deposited 999.99 29.10.2017 on to my account and also deposited another 1000.00 08.11.2017 from a FNB account they told me it doesn't reflect and gave me a case number ********** 6 and still the issue is not resolved. On the 31st of November they took 870.00 and still that doesn't reflect confirmed by Nontobeko Ngubani call centre agent and the Tean leader that promise to call and never phoned me Lundi Cele. All my payments are done, The device is not working since October till today and I have been billed more than once. Such a big company with such behaviour Honestly.