Pathetic service, fault with charger, refusing to cancel within 7 days of upgrade

I upgraded on the 18th of January, J7 Pro on FreeMe 1GB. This deal includes 10GB per month x 3, it is the 24th and I have still not received this. I opted to upgrade this month so that I could also save some money by not having to purchase a large data bundle which I needed.

I called the contact centre on Saturday to query this, they advised they could not assist and advised I need to go back to the store. I went to the store on Monday, they were offline but I need requested to write down my details and query in order for it to be auctioned once back online, they also advised me that the call centre should have assisted. The following day I called the call centre (back online), they advised they could still not assist and so I returned to the store once again. My query was NOT actioned as yet. The charger which the device came with was faulty as well so given the terrible service and also that there was a problem with the package i received, I told them I wished to cancel the upgrade. I had the device with me (still new condition), box, charger etc. This was not even 7 days since receiving the device, the agent (Valencia and her store manager, Telkom Westgate), refused to allow me to return the device unless i accept thae i will be liable for the contract cancellation fee.

I have to purchase my own data right now which I should not have to. I will now end up receiving the 10GB after I have already had to purchase my own data, and so late in the month that I will not see the full benefit of it for this month.

I WANT TO CANCEL THIS AND NOT PAY ANYTHING, AND HAVE MY R150 UPGRADE FEE REFUNDED, alternatively I request to receive an additional month of the 10GB data. Please note my charger is still faulty and I will still need to have this exchanged for a working one.