Mondo worst customer care

I did an upgrade with Mondo on one of my existing MTN data contracts for a better priced deal. All good and well untill I received the unit. It did not conform to the specifications that was agreed upon so I returned the unit to my closest MTN shop. Dit all the necessary paperwork and received the IRMS number. I was instructed to also send the document to the cancelation department of MTN wich I DID.

After 5 months of struggling to get the contract stopped and removed from my account it still has not been done. I've spoken to MTN helpline and to mondo customer care and everytime they say it is escalated and will be attended to. I refuse to pay for a device and service that I don't have nor using, and every month my other contracts are suspended and a debit irder from mondo is loaded on my bank account, wich is not provided for so it goes unpaid. That in turn gets penalized on my bank. Meanwhile my MTN accout goes into arrears with more and more each month that goes by. I cannot afford to have my accounts suspended as i use them for work