Worst provider in SA

Worst customer service ever, I urge anyone to stayaway from this Mobile provider. I renewed my contract 2 months ago to a lower tariff. They have downgraded my tariff as per the new agreement but they are still billing/charging me my previous higher tariff rate. When you call in to get it sorted you just get transferred from department to another and get put on hold for 45min -1 hour min at each department. When you request to speak to Team leader / Manager (Kerry) at upgrades she is never available and they promise you a call back which never happens. Appalling experience since I have been with them, due yourself the favour and stay away.