Bad bad customer service

I app**** for vox telecom Fibre to home, subscription for R399 per month, they sent me two invoices, one for R599 and one for 399, which means I must pay for two subscriptions which is impossible, I tried to resolve this issue before end of February, until today, I made a payment for my subscription, but still they cut off my internet, the worse part, you try to contact their customers service, it will ring until you run out of airtime, can I please get help Kindly regards Grace Mkansi *** ***