Ubereats service

I am so disgusted in Ubereats service. I am a customer for years, and since the last 3 months, the service has hit rock bottom. When escalating on their App, there is the opinion that they do not care and you just a customer that has no impact. Every order that I have placed, and I place an order everyday (R300- R600), my orders have become very delayed. I called 4 of the food vendors and they have advised me verbatim "the drivers wait for 6 orders before leaving the shop". This means that your order can be delayed after pickup by 45 minutes and when you do finally receive your food, it WILL be cold. How can you provide a service and promise and not deliver? I am unable to get hold of Tebogo (Head at Uber) and nobody is able to reach him. Not sure whether this instruct has come from Uber themselves or the drivers are getting greedy. Not sure whether Uber HQ knows about the lack of service, especially on food products.