DSTV PACKAGE CHANGE DUE TO PROMOTION

I am a DSTV customer and i was on DSTV Access and then i recieved an SMS advising me that if i upgrade to DSTV Family i will pay an amount of R189.00 till the 31 March 2018, that was on the 22 February 2018 at 19:42 PM, The following day which was on a Friday 23 February 2018 i went onto DSTV self service which I upgraded to Family , and the i realized that the offer that was offered to me had not fallen through so i called the DSTV customer centre and i was transferred to the promotions department , where i was advised that the balance will change on my DSTV , i should check at noon if the balance has changed of which when i did i found that the balance has not , i then contacted facebook and i got a call from Lindiwe Hlongwane who said i should send proof of the sms and i did to her email and still my matter has not been resolved till now .