No caring for their customers

i wrote the below review on the 07 April 2021 , till today nobody from Mondo or MTN has contacted me regarding this

07 Apr 2021, 13:58 Bad Service i took an MTN contract towards the end of March and from the day i took that sim card i have been having problems ,i always call MTN they will have their excuse this morning i called them wanting to cancel this sim card was advised it was sold by Mondo i must call them , called Mondo i waited on the line for over 30 minutes till i ran out of airtime , when i go onto their website i put my details for them to contact me but till now nobody has contacted me i sent them an email as well no response , i do not want this sim card anymore i want it cancelled it does not fullfil the purpose of me having it