and call cenre

i had a complaint a couple of months ago with regards to my account where mtn deducts more than what it should and every time when i call the call centre everyone tells me a different story then , now i have upgraded again but this time i took a contract less to what i was paying and still they deducted twice the amount i was previously paying i spoke to Kamogelo from call centre she told me that i was going to paid till now I'm still waiting, this afternoon i could not access my Internet and i spoke to Samuel who confirmed to me that i had enough bundles to access my Internet, so i must just reboot my phone then it will be fine , i did that but the problem still persist then i phoned the contact centre again and spoke to Loyiso who then told me that its because the bundles i have was only for night express and i never bought such, very disappointed with MTN i've been a loyal customer for more than 7 years now but I'm seriously considering porting my number to Vodacom or cell c