Promises a refund . But nothing 1 week later

Vodacom called me to assist with all the data that has been flying off our cellphones and promised to return 1 gig to the one phone and 500mb to other on the phone with me. 1 week later I still haven't received it. Which means someone forgot to do it after saying they would . Not the best way to fix an issue . Just makes the experience worse. Come on Vodacom get it right .