Bad experience with Vodacom

I took at a voucher with Vodacom on 21 September for R150 for an intercape bus ticket. I had to pay the money in 14 days. It debited from my capitec account on the 28th of October. But till this day i still get messages to say it didn’t debit. And I’m getting bank charges to say I’ve exceeded my account and getting charged. I tried calling Vodacom but they don’t seem to know their own products and went to Vodacom Pavilion i was sent to iT to sales consultants no help at all then i was told to call customer care again. I’m being sent from pillar to post, and I’m getting charged for unsuccessful debit and yet it was successful