Crossed Telkom lines

I've upgraded my package from a 2meg to a 4meg last week. Connection was on and off during the weekend. Monday came, and the line was syncing at 1.9meg, and I realised that my landline also changed to a different number. O phoned the call centre and the call was logged for a crossed line. Turns out I've now got the entire line of someone else. So I don't receive any calls from my contacts as the line just rings out. It's been a week now and it's really getting on my nerves. Also sent an email and no response. I would really like this to be sorted now. As I'm not sure what it is going to do to my bill. Awaiting a response