Worse service for a rental company that is renowned

Worst service of my life. Avis was the company my car insurance uses as a regular. My car went in for repairs from 3 November 2020 to 13 November 2020.the car insurance paid for the rental. I just needed to pay a cash deposit amount if the car would be damaged by me. I received the car with a full tank l and gave the car back with a full tank in the same condition that I received it. They said refund would take 5 to 6 working days. We gambeled and took monies out of out daughters firsy birthday fund in believing that what they stated would be true. As i am a middle income earner. On Tuesday 24th i called head office they said they may be able to arrange for me to pick up the deposit at the nearest branch. Explainin that my daughters birthday is on the 26 nov 2020 and that I still need to pay for a birthday cake on 25 nov 2020.today is 27nov.the branch at which i picked the rental vehicle at the East London Airport had told head office they needed to do a manual eft. I have not heard other than sorry the employee closed the matter in fault. And i now had to resort to other ways to make means of to make sure my daughter could have her first borthday party on 26 nov 2020. Ot feels that they disregarded my concerns and it felt i had to pay for their mal administration and it is ********* and unprofessional behavour. My rental agreement no is ***..i would like to know the values their company set? Definitely not value for many and transparency that is for sure. So disgusted.. They are unempathetical. So dissapointed... How would they have felt if they could not do something for their kids 1st birthday. If it were they in my shoes. Bit i am a mommy determined and were able to do so. But still no correspondence and proof of payment made to my account. Uet all these details were given 3 nov on collecting the car and paying deposit for the car.