Just Eat complaint: Cold food delivered and customer support not ready for full compensation

I received cold food delivered for my last order with Just Eat on 20 January 2023. I raised a concern and they gave me £4.55 compensation for £15 order. I had to threw away the entire food as it was cold and not consumable. The delivery driver collected my food at 8:09pm from the restaurant which was later than my estimated time of arrival. But the driver delivered my food post 45 minutes, and my food was terribly cold. We threw away that food and I raised the concern seeking a full refund. At first they accepted the issue and gave £4.55 compensation. When I asked for full refund, they said that’s their company policy. I escalated the issue and their manager denied full refund saying I have raised concerns before so they cannot refund. Whenever there was an issue I had to raise concerns. For minor issues, I left comments but when issue was serious I had to seek full refund. I have proof for all the issues. If that was not their fault then they shouldn’t have given a refund in the first place. Past few days have been really difficult. I’m struggling through this high cost of living period and paying for a service that I didn’t receive is not something I can afford. Their customer service team was rude. It is more of mental torture to seek service from Just Eat.