Service not delivered

I met Noleen on 2 Jan to signed a contract & no system was installed only the radio was done.I specifically asked for a new rental system as my existing system is old and not properly functioning.Ive started paying for service that was not fully done.I have sent messages, phone calls but no joy.On 5 Mar met Carol,she said i need to sign another contract & pay R899, & I did that out of desperation. She said that I should make the payment immediately if want the system to be installed, i said I can only make the payment on Saturday.She promised me that the installation will be done on 14 Mar as I said Im only available on weekends. Sent her msg on 12 Mar, to find out if the installation is still happening.Fri 13, did another follow up, then she said that they only do installation on weekend for customers with big installations, so I am not one of them.Raised the issue with the branch manager Jonathan on fri & he said that he will come back to me during the day on fri & even today im still waiting.I have been deceived, they just wanted a sale out of me nothing else.This has been pending for 3 months.I want the installation done asap or else i want my money back and out of this contrac