WOULD HAVE NOTICED ON SIGINIG IF CONTRACT STATEDIT

I was a previous 20 year plus Vodacom client that has just ported over to mtn due to the great deals advertised. I app**** for the iphone6 deal that was R599/ 200 anytime minutes - on signing I saw that one could not do international calls, I told the sales assistant that is a deal breaker then he advised me there's a package that is 350 anytime minutes R649, and signed the contract. Couple days later I called to find out minutes balance and I got I had R289, I called the sales assistant to query and he told me it's a rand package (which I never heard of! I looked at my contract, it states 350 anytime)if I had known about Rand package, I would've done my homework prior porting to see if a better deal I did my research and was shocked to find out that I am in a much worse position as its equivalent to only 60 minutes and should I use up the R350 it would cost me R2.35 per minute. There's a 350minutes for R649 but also cannot be used internationally. I was told that mtn does not have any minute contracts that can be used internationally- I asked to pls convert it to the minutes and will have to make a plan when I am overseas and I was told can't be done. VERY UPSET NEW CLIENT!