MTN worst network ever

Ive app**** for a new contract with MTN via their telephonic sales department. I specifically asked that they dont port my number in. I waited 3 weeks for my devices, and when they arrived, it was the wrong devices, plus they ported my number in before the phones got to me, so the driver could not even call me. When I got the devices eventually, it was the wrong devices, i mailed them immediately, seeing that I was kept in contact via mail with Shareeka ****inson (manager) asking them to cancel this deal immediately(on the 2 May 2018)1 day after getting my devices, as Im not paying for something I never asked for, with no reply, before, she was quick to finalise the deal. I went to an MTN store to give the phones back, they told me they cant help me, as the call center needs to collect the devices from me. With no response from anyone from MTN i kept the phones, as I needed my mobile number, as its my business number. I then lost my job, and spoke to call center agents to make arrangements, I have hence found employment, and in the process to square my debt, Now MTN has blacklisted my devices after accepting my arrangements. I now cant work, as my phone is my work instrument. I could have avoided this whole thing, if they actually looked after their clients. Mow my number is hostage to this network, and im bleeding money, with a device I cant even use. I would suggest no one uses this network. No one willing to help me here