Poor service

Their call centre is non existent. I called numerous times and put on hold each time for more than 20 minutes until the call dropped off or I ran out of airtime. I cancelled my subscription with one service provider and I have proof thereof. Yet my chosen replacement of service provider can't connect me because on vumatel it states I am with another service provider. So I am sitting with one cancelled service and yet no other service provider can connect me. Each day means loosing business because we work from home and also do study online. Their emails are also non existent. A connection will be great.