Non existing client services

I Took out four promotional contracts in December 2019. I paid the installments Jan, Feb, Mar. 2020. Lock down hit us and then we could not afford to pay for April, and May. I tried contacting MTN on all available numbers mailed their costumer care on numerous occasions only to receive a automated response. Tried again June & July to no avail as I changed banks and wanted for outstanding to be debited. ITC notified me a default has been logged against my name, when I checked, an amount of R 247 000 was outstanding. I discovered they have handed me over to a dept. collector which I contacted. They were only interested in making arrangements. If I make an arrangement then I am legally obligated to pay back that large amount which I refused. Still trying to get hold of their legal department to no avail.