Double Debit

Went to the drive through and my partner swiped his card. They said it didn't go through. Said if it did go through twice we must just bring in our bank statement and they would refund us. Well it did go through twice. So we took our bank statement and spoke to the manager. He took our statement and said he would fax it to the head office and we would get refunded on 48 hours. That was a month ago and still no money or communication. It's only R121 but it's the principle.