Bad sales

My very afrikaans mother in law was phoned by vodacom by English agent about an upgrade that's what she thought later she received a router and new sim and came to me I saw that it was a new Contract and she was very upset she could not afford it she was led to believe that it was an upgrade on her number but it was that damn sales trick from vodacom where theh give your number and say since you are such a good client on that number they would like to offer you this.... she thought that meant it was an upgrade on her cell which of course it was not. So I phoned them back spike to 5 consultants got tossed from this department toe next they said ok we should not install or activate anything just send it back and cancel it so we packed everything up and vodacom send their couriers to pick it up again so my mother in law phoned back to make confirm return and cancelations that was Aug. 2016... des 2017 se decides ok let's upgrade phone is no good anymore where voda com then says sorry we can't to that because you owe us about R800 because of WiFi router. She and my brother in law phoned the call centre where they told her not their problem she should have returned and canceled it!!! WTH that is what we did and I mean she did not even activate it it went back still sealed vodacom arranged pick up return and se confirmed it after pick up!! Really vodacom what will your excuse be this time...? I am already a mtn customer due to bad service at vodacom my husbands contract is expiring Feb and he is also considering going to mtn since I have been there we haven't had one problem with them!!