Vodacom contract phone

I have bad experience with this company, I recently took a contract phone with them, the phone had problems a week later I then took it back and they took it for repairs they said I would get my phone back within 3 to 4 working days, they don't communicate with me, I have to keep on going to Vodacom Maponya Mall to ask for an update they told me I would get my phone by Tuesday... It's been more than 12 days now I don't have a phone but they were able to happily debit money from my account even though I don't have a phone Please kindly assist me with the matter at hand, it's really starting to frustrate me cause I need my phone to communicate with my friends and family

Thank you in advance