MTN AND MONDO CUSTOMER CARE ARE ******** AND ******

I got a new contract.It was a zte router and a sim.So after installing it i found that the router switches off on its own constantly.When it is on the signal is so poor.I knew it wasnt my area that caused that because i have a mtn sim card in my phone and the signal is fine.So after returning the device and simcard and cancelling my contract,MTN still takes money off my accoun***** been 4 months now and that is R1600.00!!!When i phoned MTN the first time they had advised me that i need to cancel the contract with a third party(That was not stated in the contract-Mondo customer care) and they had advised me that they sent a request to MTN and they are waiting for MTN to cancel the contract...how long can this take?120 DAYS???This is really poor MTN why do you involve third parties and not notify us?When we set up the contract then everything is easy then you can assist but when it comes to cancellation then you want the customers to do all your dirty work!This is **************** and it makes me sick!!Stay away from this ****.These routers are imported from China and they dont work!!!!The worst of all is Mtn never contacted me after my first complaint on hello peter-They just dont give a sniff!!!!