VODACOM SHOCKING SERVICE!!!!

I upgraded to a Samsung S5 at Vodacom Westwood Branch in Dbn in Oct/Nov 2014. After using a Blackberry , I didn't know that the S5 data works totally differently and by February 2015, was told that I owe Vodacom over R6000. (Not for making calls, but just for data). I was angry and asked Voda to freeze the account until I've paid the amt. I agreed to pay R2101 in 3 monthly instalments (ending in April). They cancelled (deleted) my number! Thereafter I was told to reactivate the line and pay a reconnection fee. On 19 May I received a final demand letter advising that I owe R13 125.96 and if I don't pay within 21 working days I'll be handed over to debt collection. 2 days later I got an sms saying I've been handed over! After trying Vodacom on the *** no. my call was cut on numerous occasions cos I was asked to enter my voda no. but because it's \deleted"it won't accept adding to my frustration. I have numerous emails where I contacted Tshepo who was helpful in Feb"