My Account has been debited twice in Jan instalmen

my both Vodacom Contracts have been debited twice for January 2016 instalment, I have try to get some assistance from Greenacres shop where I was told there cannot assist me because there is no customer service centre at Port Elizabeth.<br> <br> I need to know why my account has been debited twice in January 2016 and why you have closed customer service centres in Port Elizabeth. <br> <br> thank you.