Poor service from Wirulink and Instalink

We had a bad experience with both Wirulink and Instalink. We started the process on 31 March for a new contract with 15Mb download. The contract was approved on 2 April and an email in this regard was sent to us on 2 April stating that Instalink will have to do the installation within 5 working days. On 9 April nothing was heard from them and I sent another email, which was conveniently ignored seeing it be the day before Easter. On 28 April, with an installation that was done on 18 April, we still do not have the new equipment as agreed in the contract. We already paid the first instalment but we still sit with an old router and an old dish from the previous contract. On Sunday we had downloading speeds of between 0,3 and 0,5 mb/s. I have contacted Wirulink 15 times since 2 April when the contract was approved and still no joy. The technician, Patrick at Instalink, did his very best to help us, but the rest of the team (Michaela and Pieter) was not responding to emails, to requests to call back and she even tried to **** her voice in order for me to think it is someone else. I should mention that it was stated in all correspondence that it is an essential service residence (medical doctor), and he had to refer some of his patients to other doctors or emergency facilities (especially at night) because the internet was too weak for video consultations.