Telkom fails again , ADSL Line faulty no help

Today 2 weeks ago i had a landline installed for ADSL uncapped wifi , wifi worked for a few days and the BOOM it stopped , since last week Tuesday 22 May 2018 i have been calling everyday and spoken to the consultants at 10210 everyday they say that the line are working fine , when we do the Wizard setup for the D-link router it does not work , then they promise me some one will call to help me set it up witch no one ever does , Friday night they told me that the router was faulty , ( Brand new router ) and that i should take it in to be tested , been to telkom in Kolanade , wonderboom and wonderpark not one of them can assist as they dont test the routers , so it cost me R700 to go and buy a new router from incredible connections , take the router home and wham , router is installed all devices picks up the router and connects but no internet , once again we call so they tel us no the router was working so i have just lost R700 rand , so we try and try and try again to set it up still experiencing the same problem , now they tel me its a setting or a problem with my username and password , please can some one please do their work and get in touch with me so that i can have this fixed , im so disappointed i feel like ending AL 4 my contracts with TelKom