On Air Tv Unprofesional Service Provider

I am at wits end with On Air. On 26 May I returned their device after I had to pay them R350.00 to collect. The parcel was collected on 29 May. On 4 July I recieved a sms stating my account is in arrears and threatening me with final demands. On 5 July I took a debit off my account of R198.00. I phoned them and cancellations confirmed that the account was cancelled and transerred me to another dept which never answered. On 27 August I recieved a call from On Air accounts stating my acc is in arrears, explained to her.what happened aftet she said she will get a manager to phone me back which never happened. On 28 August I recieved a sms with the final demand threat again. On 29 August I tried to phoen twice where the call kept ringing for about 8 minutes then the call just says goodbye. Today 31 August another debit went off my account. So far the total of R750.00 has been paid to On Air including the R350 collection fee. I want my R400 refunded as I dont owe them anything, the device was returned on time. I have emailed so many people and just nothing has been done about it.

I want someone from On Air to fix this problem, they are the worst service provider and the sell devices to you under false pretentions.

I honesly dont suggest that they should even be in business as they ***** from people.