You can also reach out from newspapers, Facebook, and other online platforms. If you are part of a WhatsApp group or having lots of friends and relatives in Dubai Ask them and you will be wondered by how many good recommendations you get.
All well-established Home appliances service centers in Dubai must have direct manufacturer support and be able to handle major brands appliances. If you aren’t sure about that then ask the appliance service center for the license or certification. Otherwise, look at their company website.