Inconvinient

I mistakenly purchased 1000 airtime instead of 100, immediately I called the contact center, and spoke to a lady named lunga she followed the procedures and created a case recieved a case number and she assured me I will get my money back, and Telkom turn around its 72 hours excluding weekend, I did wait from Saturday till today their turn around was yesterday, haven't recieved anything I called back, today to check and to my surprise my case hasn't been attended to, spoke to nobuhle and thokozani today asked them to make a reminder because this is inconveniencing me, as I had to pay some installment which now Telkom is taking their and not actually attending to this, I am not happy with the feed back I am getting