Cellc Customer Service 0/10

Hi. I did a Cell Phone Upgrade with Cellc over the Phone. Phone was delivered to my house via Ram Courier. Phone box had No seal, No Accessories and box was tampared with. I returned the device the next day after speaking to a Manager. I was advised the upgrade will be reversed once the device was collected. Its now been 3 days and Cellc refuses to assist. Made more then 25 calls to speak to a manager but all the consultants are telling customers that the manager is unavailable or not at the office to speak. They ask to provide contact details for a call back from the manager but no one follows up. I have been with cellc for more then 15years worst service ever.