BRIDGE OF CONTRACT AND PROMISE

On November 2019 I upgraded my contract on *** and I was given a R65 airtime for free on *** the agreement was I'll receive this, R65 for free for 24 months which means up until 2021 December. To my greatest surprise I've been billed for this R65 airtime and I'm paying for it. I then contacted vodacom on November 2020 and I logged a complaint in regards with this matter but the response after the 48hrs was this R65 airtime is not for free. Even today I called vodacom billing department and I related my story to the consultant by the name me of Nokuzola and she also told me she'll logg a complaint though she also state that promotional sim cards are for free for 24 months... But I'm paying for mine. I so cross 1nd feel I'm treated unfairly a's my matter is not taken seriously by vodacom nor addressed with fair. I'm wondering that everytime I call vodacom about this I'll told that they'll logg a request. I need my R780 refund and vodacom to honor their promises of giving me the R65 free airtime without charging me for it. I've been their loyal customer since 2007 but I'm like a miserable headless chicken. In addition they must show the apology by composition me as they even produce the voice records between their consultant and I when I took the upgrade. I've tried applying for some mtn deal and I was declined due to over expenditure. This also affect my itc record. As a vodacom loyal customer for the past 14 yrs I feel HUMILIATED.