FNBconnect.complaints

I am very disappointed with FNB connecta services , they billed me R888 out of data usage , when i ask how is it that that am paying R888 when my data is 500mb , they said i used data out of bundle when i ask them how come without my concerned that they enabled out of bundle usage , they(On their own accord without my knowledge) said they gave R400 out of bundle usage , when i asked how come now the bill says R888 when or if they are giving R400 out of bundle usage , to this day no one has explained, i then asked one of their agent Keegan Meyer to send me the data usage report to my shock the usage report show only NTP traffic on the 8th of may just between 12 and 1 oclck , not browser traffic whatsoever on the usage report, i really need fnb to pull up their socks and sort this matter out, otherwise if they continue this lackluster service i will be jumping the ship, i cannot continue wasting my time asking question which am not getting answers to. after the agnet send me a mail he said he closing my query just like that ,without even explaining what he just send to me