No voucher post claim approval

I logged a claim for a TV that fell off the wall and broke at the end of August. On 2 September I was advised that the claim was successful and that I would receive a voucher for the replacement value of the TV less the excess. It is a month later and I have not received the voucher. I emailed the Claims Administrator. No response. I emailed the main Discovery email. No response. None of the telephone numbers they advertise work. Today I used the Discovery WhatsApp - Ask Discovery. I am still waiting for a response on my query. The response I got gives me instructions for a Covid Vaccine. I have never had such poor service from Discovery. I just don't know how to follow up any more as none of the available communication methods are working.