Poor Line Speed

It's been a couple of months now. We had a 10MB per second uncapped ADSL line installed. This thing is super slow. We have logged a call, sent a message on their Facebook page, the problem was escalated (10210 number as well), a technician apparently "fixed" the underground cable that was faulty, but still extremely slow internet. No feedback, not a word on a way forward or any sort of assistance to have proper fast internet. This is ridiculous, we have to pay for something that cannot even run whatsapp! Could someone please attend to this issue. Right now signing for this was one of the biggest mistakes we've ever made.