Mytrip.com

I have booked my trip with insurance and all the protection yo can get. When new Covid regulations came and I tried to change my booking. I have now tried for the last 2 weeks to get hold of them cost me a fortune on tel and still no joy. My flight has left and is soon to come back without me but still cant get hold of them. Have sent several e-mails and still nothing. Please do not book with them.