Manager failing in her duties

My teenage daughter and her friend visited the restaurant. When paying, the card machine showed that the payment did not go through. They tried again and got the same result. The friend then paid the full amount. The manager on duty promised them that the funds would return to the account automatically. 10 days later nothing had happenned. My daughter called the number she was given., the phone went unanswered a few times. Yesterday I had to go into the shop and spoke to a guy called Liberty. He told me that he knew nothing about and had he known, it would have been sorted. HE still wanted me to give him more time. All the while, Liberty is trying to explain what could have possibly have happened, while the manager that was fully aware of the problem acted as if she did not see anything. Until I insisted that Liberty calls her. She told us that this was not a special case, and it happened all the time. Having taken the time, petrol and effort to go to them to sort out something that they should have resolved on the same day, to be met with a manager that saw almost nothing wrong in the situation, was disgusting to say the very least. She was shocked that I was upset. I was very disappointed in how my child was treated. I have to applaud Liberty though. He did his best. I am still upset though.