3 month wait for line install...

I don't know if this is the right place to complain but here it goes. In December 2017 I ordered a Home uncapped ADSL package. It is March 2018 and I still haven't received my line. I have been up and down to the telkom store where I placed my order(Kimberley) and also phoned Telkom numerous times. I eventually get a SMS in early Feb that I have to pay a R700 deposit so my order can be processed. I pay the deposit a day after the sms and they confirm it has been received. I am at breaking point. I want to cancel the order but I am afraid of losing the R700... I already have an existing line that I pay every month on time. Why can't I get the same service from them? Im am very disappointed in Telkom and I wouldn't recommend it to anyone.