Bad Vumatel client service

Vumatel installed their fiber cables / box and damaged my main power supply cable outside of my property. I had to get it fixed at my expense after a day without power, and now, trying to get the money back, is nearly impossible as nobody is coming back to you.... (1 month and 6 attempts from my side to make contact) but when they want your new business they are very eager. Just a thought, because I considered getting my fiber subscription from them, but not anymore, because this shows me their level of client service!!