Absolutely NO service for months

I have been trying to contact MTN Business for months now to 1) cancel 2 contracts that were up for renewal and 2) get a quote on migrating a Sky package to a lower priced plan. Every time I call the call centre I get chucked from pillar to post, only to end up at the department I originally spoke to. When I do get a hold of someone with a brain and get their email address, they respond once and then never again so that when I try to find out why I have had no feedback I am simply ignored. Going in to a local branch doesn't help because they just tell me that the call centre is on strike. I simply don't know what to do - MTN is unreachable. I sent emails to the addresses that were gave to me and only recently received one response to an email I sent in APRIL.