Terrible service -Dog Food App

I ordered on the dog food app because the first time I ordered the service was amazing. Now I’ve ordered again and the service is so bad , I ordered and paid almost a week and a half ago and I’m still waiting for my order. I received one message advising of a delay and that my order would arrive the next day. This never happened. I’ve sent countless messages and received no response. I hope I get a response to this message.