Door Dash quotes time of delivery and estimated time of arrival and then changes it AFTER you place your order Palo Alto California`

I am sick and tired of the lies from Door Dash. First time I ordered, it said that the delivery fee would be $6.99 and ETA would be 30 minutes. AFTER I PLACE THE ORDER AND PAY, you cannot cancel it unless you email support and they call you back in time. So now I was charged $9.99 and told it would be 50 minites. That is a BIG difference. Then one of my food items was missing. Support calls me back the nbext day and offers me a $5.00 credit. I  told them they are a fraud and have about 5 minutes to  return the entire amount. Which they did. Fast forward to today. I had a gift card that I just wanted to get rid of. I placed an order with Door Dash Robbery Service. I bought a $6.99 chicken bowl and after I pay their crazy a** delivery fee and tip the driver, it is $20.00. DO NOT EVER tip the driver in advance like the site asks you to. A tip is supposed to be for exceptional service received. It is not an entitlement.