Billing

For the last 2 months my account jump from between 800 and 900 a month to R3300pm, whwn I querie it at Cape gate the lady told me its for whattsup and Internet as I never use my phone for internet even the updates I do with Wifi I'm very unhappy seems to nobody cn help they just happy to take your money and thank me for be n good client so who is using my internet why such high accouns if I dont use it also they told me some one will come back to me 1 month later again with a big account off over R2000 still waiting