Overbilled

I recently upgraded to a Smart M contract. I was previously ported from Nashua Mobile to Vodacom. On my previous account with Nashua Mobile I had BIS, 200 Sms Bundle and I would get E-bucks kickbacks. I received my first invoice from Vodacom and at no point agreed to an extra 200 SMS's (bundle) when I did my upgrade online, but I have been invoiced for a 200 sms bundle...I took the smart M contact because you got 300 sms's with it as well as 120min talktime and 300MB data. Why are you invoicing me for the extra 200 sms bundle??? If that is the case you should be billing me for BIS and I should be getting e-bucks kickbacks (none of which was pointed out to me when upgrading online!!)!! I also want to query what the R 20 sundry Charges are all about? It was an extra charge for my previous upgrade with Nashua Mobile, but why did Vodacom now charging me the same when nothing was agreed to on my online upgrade??? I would suggest crediting my account as I do not use the 200 sms bundle I am being charged for as well as crediting the R 200 Sundry charge as I don't know what it is for???