Rain Billing *******

Good day, I subscribe to rain for a unlimited off data usage between 11PM and 6PM. I have experienced an uncertisfactory treatment regarding my billing. My bill for this month is R500 instead of R250. For the past month of august my data was cutting off at 6PM as per my initial agreement. I have sent through a query regarding the matter but the lady from support department responded by saying my bill is R250 unlimited usage between 11pm to 6pm plus 5gig that I have use during the off pick hours, which R50 per 1gig charged between 6pm and 11pm. I am surprised with the billing of R500 because I've set my off peak data to 0 usage and the whole month of august I've never used any data between 6PM and 11pm, because it was cutting me off exactly at 6pm. The same incident happened in the month of July but I ignored. This month again is happening. Please assist by acquiring my billing information and the IP addresses that where using data during the off pic time for the month of August. The lady who rep**** to my query is JABULILE NEMBULA