BRIDGE OF CONTRACT

I Am a New Vodacom Contract Customer I took a Contract with Vodacom in March 2016 first Debit Order to go off on 26 April 2016 as stated on my contract with vodacom. Vodacom has tried to debit me on the 22nd of April which bounced because of innsufficient funds as i only get paid on the 25th of every month due to vodacoms negligence my bank has now charged me more than R50 fee due to the bounce of the debit order. It is the first month of of this contract and i am already having issues with vodacom, right now i want to cancel my contract due to the negligence of vodacom and i shall not be liable to the cancellation fee because it was vodacom who broke the contract and not I.