not keeping their end of the deal

Last week I made a arrangements with Vodacom to deduct the full amount of month and arrears amount on the 1 March. My line according to them Will be unlocked and can use as normal until the 1 March if the amount is not debited from my bank they will lock the line again. Guess who's line is locked again before the 1st. This means they broke their agreement with me I phoned them and spoke to a supervisor that was so arrogant towards me he can unlock my line so I can receive calls. Newsflash I could receive calls even when my line was suspended so whats that going to help I need help this is my third hello peter towards vodacom I am in my home language GATVOL for this. Don't make a agreement towards me and not keep it. I will get in touch with a lawyer to find out what steps I can take if vodacom breaks a agreement