Happy bays car wash Lost money and cant get a refund or a call back!! Sanford Florida

I've been coming to this car wash for years, faithfully once a week. Around may 18,2018 I came to wash my car, put $20 in the change machine. The machine gave me $5 in quarters and did NOT give me my 3 $5 bills. So I was out $15. I called the company multiple times with no call back. Then again about a week ago, same thing. I put $20 in the machine and it only gave me $5 in quarters. So now I'm out $30.. I've called the number posted about 8 times in the last 3 weeks. I still have not received a call back. There's a lot of reviews of people being over charged on their credit cards or losing money on the machines and they also have not received calls back. Something needs to be done. Bc I want my money and so do other people.