Lack of customer service

Hi, in September 2023 I booked a car hire through ECR and also took out their insurance package. I therefore only paid for the booking fee and the insurance, the balance to be paid to Green Motion car hire company on arrival. On arrival at Glasgow and been picked up at the airport the hire agreement could not be finalized as my drivers license validity did not satisfy their requirements. This was because it is renewed every 5 years and so had not been valid for the required 3 years as it had only been renewed 2 years previously. even though the license was issued in 2001 it was unacceptable to Green Motion Car Hire. I was then forced to return to the airport and rent a vehicle at almost three times the cost. Since that time I have been trying to recover the insurance premium, and only the insurance premium, from ECR. I have supp**** ECR with a copy of my drivers license and also the car hire contract that I had to take out at Glasgow airport to replace the hire refused by Green Motion. e mails to ECR have bee ongoing since last year but ECR refuse to refund the insurance premium as Green Motion insist I was a "did not show". I asked ECR why they think that I would take out another car hire at almost 3 times the cost as opposed to taking up the hire with Green Motion on the same day. Sadly ECR prefer to believe Green Motion and that I did not show. Last week I received an e mail saying they would not refund the booking fee. I never asked for the booking fee to be refunded, only for the insurance premium as obviously it was never required. Dealing with ECR Customer relations has dragged on for 11 months and to no avail. I would caution consumers to be wary of ECR and also Green Motion Car Hire. My booking reference was ECA 67591 and the contact was ***