No service at all!!

I do not recommond using Supersonic. I took up an offer for fibre internet which was to be installed on 01 May 2020. I have an existing fibre line, so just a transfer. To date I cannot get a response for why they have not activated my account or delivered the router. They do not answer telephones are not contactable via email and the whattssapp takes around 10 hours to receive at response , only to be told that the coordinator will contact me. I need to cancel my order with immediate effect but cannot contact anyone to do so. Please note I am cancelling my order with immediate effect.