POOR SERVICE

On 24 February 2015 I purchased a Samsung mini S3 and 6*29 Vodacom. Elmarie was the sales person and an other lady at the main counter RICA registered my phone. When she finished and I got home the phone was still not registered. I when back she registered again and it was successful but when I got home my airtime did not work. I phoned Vodacom they said the airtime is not registered I must take it back to the store. I then went back again and spoke to the lady that Registered my phone on RICA she said they must now contact their supplier and they will contact me when its solved then she took the airtimes. After a Month in March I had no calls from OK Blue Downs so I went to the store. I then spoke to the store manager she confirm the lady that helped me is off but she will investigate the matter and \ CALL ME". After a Month no calls from Ok then I Went to the store again today. I spoke to the store manager she said that the lady that helped me are no longer working for them and I must go to the police station . HOW IS THIS MY PROBLEM?? I'm not paying this account until this matter is solved. OK was my First choice when i wanted to purchase an item but now I think twice"""