Wimpy app sucks

My family and I went to Wimpy Roadhouse in Lakefield. All went nicely lovely day. Used the wimpy app that they want you to use. So, I paid and went off. However come back a month later to find out it has bounced back. Now the waitress wants me to pay her into her account. This app is a real pain in the ass. I don't mind paying the waitress back but the system should tell the person properly and in time.