Selldirect - lack of service

I was contacted by Telkom Mobile to renew my cell phone contract, which I agreed to on the 10th of Nov. I was advised of a 4-7 working day SLA. A 3rd party company - Selldirect - delivered the incorrect device on the 17th of Nov, I immediately reported the error and was told the incorrect device will be collected the next day and the correct device will be delivered within the next day or two, within the SLA. The incorrect device was only fetched on the 20th of nov and only after several phone calls made by me.i was then advised that me new device will be delivered within the next day or so. The device did not arrive and only after numerous phone calls to Telkom and Selldirectdid I finally receive my decvice on the 27th of nov, 13 days after agreeing to the new contract! Now I am placed in another predicament, although I have the device I am unable to use it untill Selldirect activates the device. I have made about 15 calls to Selldirect and 3 calls to Telkom in this regard with no answer from Selldirect. I am now helpless and unsure where to seek assistance from.