FLYCOOL should stop operating as a business

I have been with FlyCool for their Fiber service that they now fail to provide me yet I paid full amount it's been 3 full days no assistance whatsoever they are unreachable, when I send them WhatsApp and give all the details required I get the same response always that an agent will get back to me yet they only call you phone rings once and goes off no number to return the call or reach them, please deal with this company for me as I have exhausted all my sources and still can't be assisted