Terrible car, terrible customer service by Goldcar - they have not even apologised

I collected a hire car from you at Malaga airport on the 5th August 2019. Initially I felt the biting point of the car felt high. The car was then lightly driven to our apartment in Manilva and a few time locally over the next 6 days. I estimate I covered 200km over flat local roads and driving safely with my young family. On the Sunday 11th around 9:30am, we drove as a family to Estepona and the car was losing drive and appeared the clutch was failing. (Your mechanical report will be able to provide technical diagnosis). I managed to get the car very carefully and slowly into Estepona. I then immediately called Goldcar customer services to inform them of the situation and they advised me to drive to Malaga airport to replace the car as this was the only office open on Sunday. Just outside Estepona approaching the AP7, the car came to a complete halt on the side of the road and was no longer drivable. On calling the breakdown recovery service and reporting the issue, a tow truck came to collect me and my young son. As you will appreciate, the hour wait for the tow truck in plus 30 degree heat on the side of a dual carriage way, put my son and I at considerable risk of harm. The car had to be winched onto the back of the tow truck. We continued our journey to the Goldcar Garage next to the airport and were able to collect our things from the car. We were then driven back to the car collection point within the airport. By this time about 3 hours have elapsed and we joined a queue which took a further 45 mins to be served.On reporting the issue, I would have expected a replacement car would have be provided, as the original car had fallen short of the service we had paid for i.e. being driveable. We would have also have expected an apology from Goldcar for not proving a roadworthy car that we had paid for in good faith. This was not to be the case