Terrible repair, Laptop came back worse---TWICE

My Laptop had issues with the charger, so I sent it in with about 8months on the warranty still left. First time I got it back the cover was scratches as if someone had at it with a knife, Windows was deactivated (MB replaced) and the issue was still unresolved. I then sent it back again, they activated windows, replaced the covers and used as much silicone sealer as can fit into the laptop, but yet the charging issue still persists but now the monitor doesn't switch on (at times) and I can't install drivers. I don't even know how people can make things worse like this. Furthermore, their team offered to send a courier so that I don't need to drive 1h (per direction), nothing happened and they stopped communicating with me. I cannot believe this company handles warranties like this. Everyone makes mistakes, but making several mistakes that worsen the situation is beyond me. Do they not check the laptop before giving it back? If you can avoid them, do so, it's been 9 months, my warranty has expired and I am still constantly sending them emails. Save yourself the pain.