Line cancelled for no reason

On the 1st of March, we woke up to our internet not working. After speaking to about 3 consultants through out the day who could not tell me what the problem is, i finally got through to Craig P who was able to tell me that my line has been cancelled and it is being used by another ISP for another customer- why? I don't know. I must admit that Craig P has been helpful and updating me from Tuesday until today - Friday the 4th but nothing has been resolved. As I mentioned to Craig, I have been patient for the past 4 days but we are getting nowhere near getting this resolved. Craig mentioned that Vox is waiting for the other ISP to release the line back to me and has management working on this but this has been the story since Tuesday and every time I am being told this has been escalated and I don't understand why we have to wait for the other ISP to release the line when the line was mine to begin with. It was easy to cancel my line, why can't they cancel the line to the other customer and give it back to us? This is so frustrating and so unfair for me as I work from home. Please help in rectifying this .. I am beyond mad and inconvenienced