Vodacom *****ing my money

Good Morning i app**** online for a vodacom contract got the contract and device was delivered but vodacom never ported my number like the were suppose to. so i was informed that the only why to solve this was to return the device for them to cancel the contract and do a new contract i was also informed that all money debited from my account would be credited back to as this was an error on vodacoms side. I was also debit for more than what my statement and invoice said? i was billed a gain this month for a contract i dont even have and still havent been reimbursed fot the previous month when i i phone vodacom i just get old that it will be soted out this time?