Poor service

Three months back i got into a contract for a ****le and cell c Sim card, when i received the goods through delivery they were not to my satisfaction and i returned them back the next day and called cell c to cancel the contract. They continued to debit my account for the last three months and even when i was calling their customer service i was taken from pillar to post. Finally when they indicated that my account was cancelled and they would refund me and a credit note has been created, when i call to today I am told that my matter is under investigation even after getting confirmation and query number on the 11 November 2015 that i will be paid back in 7 working days. This very appalling cause i have been very patient with this company as i have been a loyal customer for years.