Company does not refund my money after 5 months.

I ordered an expensive product March 2021. After my product was not delivered I asked for a refund. Initially I received emails back that I will be refunded. However I have not been refunded. They don’t answer my emails anymore and you cannot phone them. It is now 5 months later and I am desperately worried that I will never see that money. We are pensioners and I am ill. This is a heavy blow. This company has very bad customer service