poor customer service

on Monday the 02-12-2019 i contacted Multi Choice to inform them that i have received a incorrect billing and was told by the agent Nomfundo that she has escalated the problem to the price lock department and will be contacted within 24hours and was given a ref number . i called again on Friday the 06-12-2019 and spoke to an agent called Sibongile and she advised that the problem will be resolved in 2hours and to date my problem has not being resolved . it really disappointing know Multi Choice don't value their customers