No wifi. Blame game

We upgraded to a mweb adsl wifi router and from its installation it has only worked about a day and a half, <br> Telcom has tested the line and said their side is correct but still nothing now mweb and telcom is playing the blame game and no one wants to do something to rectify this , and then your tech dept thinks they are speaking to an uneducated man that knows nothing, with the dsl line out of the router i ping the router through my pc via ethernet then it says its unreachable and after the 3rd attempt it goes through but it looses info and only 2- 3 packets go through and the rest is lost, who will step up and fix the problem cause we are paying for something that does not work..