I got banned from Deliveroo for a similar reason. I was a heavy user (several times a day every day) and mistakes are bound to happen - I'd estimate that maybe 20% of my orders ended up having something wrong. I guess they just assumed that 20% is an acceptable cost that the users should bear despite all the fees they add (to both the user-facing price and the fees they charge to restaurants)?

Uber Eats wasn't much better and tried to still make me pay for delivery fees even when the only item in the order was wrong/damaged, but a chargeback quickly took care of that.