New Promotion stilll waiting.....

They have a promotion on and I called on Sunday & it was successfully submitted as the all centre agent confirmed , they will call me back in the next hour in that time my air time was done cause I had to hold on so long and I had to ask him about there promotion and he was still in my account and it was 11am , I called back at 12 they promise to install Monday . Monday I called , they promised later today & I explained I have to leave early due to no one at home so they confirmed 4:30 for 5pm they will be there . Tuesday I called again , still no joy & the same promise was made they will call and will install today. Wednesday I called again same story and I said to the call centre again the same promise, if its not done after all my air time wasted waiting and keep I recharging new air time cause of there a poling customer satisfaction and unsatisfied delivery , I will put my agony and vast ration on hello Peter by close of business Wednesday but rushing home everyday I couldn't ,so today I need to let them know I make a promise and I keep to it. Clearly they don`t believe in customer service and generating leads for new business. My question why have a promotion and they can`t deliver ? why do they have such *********** people working for them making you call them everyday and follow up? Clearly Vodacom made money out of me just for calling your landline call centre Sunday.....? I am so perturbed . PLEASE ANSWER ME?