Doubled Charged

On the 25.11.2017 I was double charged in the Tokai store.I informed the Manager on duty that I was double charged and he assured me that the money will be reversed and if not he will give my money back in cash.Up until today I have received no feedback after I took a bank statement to the store and called numerous times.They said it would be investigated and they will get back to me I even emailed their customer support and have also received no response.I cant get through to the store because the number is constantly busy .Their customer service keep saying somebody will get back to and this is only because I am calling them.Nobody from the store and customer service has contacted me regarding this matter.