Europcar.... poor service delivery and no response

Rental Agreement *** I collected a vehicle on Friday 27/11/2020 from the Hatfield branch with rental agreement ***. When I collected the vehicle it was not full. I returned the vehicle on Sunday 29/12/2020 with a full tank and sent an email to *** on 30/12/2020 attached pictures I took of the dashboard. I have not had a response from Europcar since and am disgusted with their service delivery.