Foodpanda — blocked account

Foodpanda blocked my account for no reason. I've placed only one order with them, after that they started sending me promotional messages and offers. When i tried to apply this code it shows "you do not have any coupon". So i contacted them via mail and asked them to resolve this issue or please stop sending me messages. They replied that my account is black listed, they didn't mention why they black listed. Its been one week now.
They are still sending me messages but i can't use the codes. This messages are very annoying. Foodpanda please stop sending messages or please remove m account from blacklist