Mark Electronics - not to be trusted and don't provide a physical address.

Mark Electronics advertise that they fix TV's on the customer's premisses. They don't provide any fixed address. On the 15th of August 2025, they sent a technician to fix my TV but after they had left the Tv had a different fault. The next day they took it to their workshop and since then both "Mark" and his technician haven't returned my Tv despite several promises from "Mark". They only communicate through WhatsApp and email, which means I have no idea how to find their physical address. Be very careful of Mark Electronics as they can not be trusted. Anyone who has dealt with them please help!