Unfair Consumer Practice and Misleading sales peoples

I would like to log a complaint to express the level of disappointment and being misled when i app**** for a contract. i was at the clearwater branch on the 29.09.2017 to apply for a contract of a phone which i did recieve. The person who was assisting me explained to me that i will be charged a pro-rated airtime and data as this was not at the first day of the month. i did not have any problem with this as this is a standard practice when you apply for a contract. To my shock today! i was viewing my billing invoice and i see that i was charged a device fee of R480 from the 01.09.2017 until 30.09.2017. This did not make sense to me at all as i i only had the phone from the 29.09.2017. i have called the customer line on 26.10.2017 at 17:34 and i spoke to Nontobeko Mkhize who explained to me that a device fee is charged on a full month basis only which doesnt make sense to me. How can i pay for the device for 28 days which i did not use or even had the phone. Had this been explained to me i would have rather app**** for the contract at the beginning of the new month which was only a day later. By customer care principle this is totally wrong and is an unfair consumer practise! that i get charged on an item for the time i did not have it but conviniently, for the airtime i was charged pro-rated. Why is pro-rata selective while i am taking a contract on both the device and airtime but they are being treated as different. What upsets me the most is that this was no explained to me which means that your sales stuff do not care about the one principle of keeping the customer happy and they only care about making commission on the sale. I demand a pro-rated refund for the device as that was done for the airtime! i cannot donate money to a cellphone account for the time i did not use it. it is morally wrong and unfair to the customer! I would to please be contacted for a resolution as attention on this matter urgently.