Im still waiting for my device and my contact expired

I wrote below email on 12 December 2017 to ********** as advised by call centre consultant but still no feedback from MTN, today I forwarded same email to **********

Good day

I’m writing this email to register my dissatisfaction and disappointment of service you are giving me as a loyal customer who have been using MTN for over 10 years.

I app**** for upgrade on specials you offer for black Friday ( 24 November) at Standard bank (Simmonds) MTN, till today I do not have my phones. This was a deal for 2 Samsung ( J7 and Grand Prime)- R399. I have been visiting store on daily basis but every time there is an excuse, I have been patient and understanding but now it seems like I have to beg to for service. I’m not happy at all with treatment I’m getting from you(MTN). I hope you will take this email serious and offer solution to this long outstanding issue.