Vumatel not giving info on failed line

We have had our contract with Vox now for 3 weeks. Last week vumatel came to check our box out on Thursday 22nd December and a second Team came to replace the cable outside our property. Since then I've been receiving Install fail smss and emails and no one can tell me why or what's going and when it will be fixed. I've been told it's from Vumatel side as they meant to send me a code I can send to Vox so I can finally connect the router. My next installment is due next week but I've been sitting with absolutely no signal. Finally get to number 1 on call and then it hits 5pm and I've spend over 30 minutes and airtime on the phone to have the call say the person isn't available when it is finally my turn! What must I do? The service delivery and communication is terrible!