Disgusted in service

Good day I received the LTE interim mid April I was told that it would be free for two months while i wait for fibre , on the 3rd may i checked my bill and saw that i was billed incorrectly and charged for the LTE , i logged query on 3rd May and has been following up and i was told they are working on my query and will give feedback soon ,it is now 25th May and still no reversal of incorrect charge or credit passed .i am disgusted in the service i received and what could take so long that this is still not resolved i logged this on facebook platform 3days ago and was told they willl give feedback i honestly have no words i asked to direct me to someone higher and the lady at fibre centre told me she has escalated my query to manager which was last week up until now no one called its just you apologize for inconvenience and frustration wot the heck please i am fedup and tired of same reply from you