Fly.cool bad service

Yesterday I complained about fly.cool/Vuma Since Monday I've complaining about not getting network properly and what not make them to send a technician to come and see what's happening? They are unreachable, they take their own time but when it's time to debit account they don't miss that. Right now they increased monthly payment but they give me rotten service. This router it's leaking a brown stuff and looks like it's burning on the cover, what makes them not to send someone to come and check, instead they will say your area its covered when we check on our side, switch it off for 30 Min, that's what they know and I'm working from home.