not convinient

i bought 10 minutes that last for 2 days on Saturday, i was left with 3 minutes on sunday and decided to add with another 10 minutes which was gonna expire monday 13 nov. i used 3 minutes that i was remaining with on saturday and used my 7 minutes from my sunday minutes, which means i was left with the balance of 3 minutes to use today and even last night i checked. today wen i woke up my minutes are not there. what annoys me the most is that this incident always happens. vodacom will chao ur minutes and you always have to call for refund. you can only get that refund if the consultant is willing to help u. today when i called i was helped by the guy called Lindiwe if i heard him right he was very rude. vodacom must do something with their technical probles coz if the say the minutes expire in 2 days that should be 2 days not the other way round. it really sucks. if this just for you minutes are not working for them they should say it unlike always having to call them with the same problem everyday