*****ing Vodacom Sucks

Good day, so after my review last week about the double debit order by vodacom and numerous calls to find out why they took R3700 extra the last answer was because i moved my debit order dat 5 days later than normal they charge me 100% extra so i pay 25 months for a 24 month contract i will stay with ny opinion that this *****ing as this was not explained to me that i would pay R3700 to move my debit order how idiotic and how does this make sense ?