Daylight *******!

I took data on March 18.They told me I only had to pay R460 for those 12 days which I did.I never pay for April which I did use.They cut me off 2 May.Now they want me to pay May and June which I never use because you pay a month in advance.Today I got a bill for R5000.My monthly fee is R1018.For using data for 30 days is R5000.Make it make sense.I am now going to legal channels to report them.