Billing is Wrong. Urgently

I have a wireless telkom line at home. The package of 10 gig. We only pay about 700 per month. We don't connect the telephone at home as we only using the Internet at home. THIS MONTH I got a bill off 3698.75. How can this be possible if we don't even have a telephone connected. Also our new complex in broadacres has informed us that telkom laid lines so I phoned the call centre to have a fix adsl line installed . They said over the phone it will take 10 days. When I enquired a few days ago I was informed that the order was never logged on my profile by the sales consultant. I am to busy to visit a telkom shop for to apply. . I am very unhappy about the billing of more than 3 thousand that we never used as we buy bundles when wr used the 10 gig and about the call centre who never placed my order to install a fix line. I want answers immediately as i won't pay my account untill this is sorted. Kind Regards Diaan Daniels