OVhd sending me in circles...

I had purchased my OVhd decoder in 2017 and realistically had lost the slip (proof of purchase). I had only activated it this year. I had relocated twice and the second time it just showed an error message "No Channel". I had called the customer care call center countless times and we couldn't find a solution. I even went as far as getting two different installers out and both attempts ended with no success. I was then advised by the OVhd rep to take the decoder to my nearest Game store to have the decoder tested however once I got to the store with my decoder - I was advised that they are not able to test the decoder in any way. after a waste of my time, energy and petrol I had sent a WhatsApp to the OVhd number and have not received a reply ever since (Poor Customer Feedback/Service). I understand that I don't have my initial slip however, the fact that I am not receiving any feedback regarding the issue, being sent from pillar to post as well as wasting money on fuel and time. I am honestly very disappointed in the service received because the customer care agents are nice people.