I have had an issue with the connectivity of my Wi-Fi and a lot of unresolved miscommunication since inception

I have had an issue with the connectivity of my Wi-Fi and a lot of unresolved miscommunication since inception. I initially opened a contract but switched over to a prepaid option paid the 199 starter pack with the help of a consultant . It worked for a few days then stopped working I called in many times , no answers when I do get answers it goes to a consultant who explains that the contract was never migrated to prepaid and that I have 2 different ‘accounts’. Because it wasn’t working I cancelled the debit order but today I paid the outstanding balance on the contract but still nothing works . I tried to buy the vouchers and it didn’t take it either . I understand that things like this happen but I was promised that i would have the person who migrated call me and fix it but still nothing. It’s been weeks and the ticket was closed as resolved. Their customer service is non existent . I can’t even get them to answer the phone to close the accounts