Billed almost double 2 months in a row

<p>I checked my balance on my account today and where it usally is R500 - R600 for the past 2 years, it is now almost a R1000.</p> <p>I cannot seem to get through to the call centre.</p> <p>I think it is something to do with my contract as it upgraded in March 2016, but I asked to stay on the same package and it was confirmed by the call centre agent at the time that my package won't change.</p> <p>My data is also split up to 500mb during the day and 500mb during the night (12am - 6am) where it was usaully a flat 1 gig anytime.</p> <p> </p> <p>Please contact me as soos as possible. ***. </p>