Response very bad on complaint

Bought a Bennett Read 1600W vacuum cleaner on 22 May 15 On 25 July I visited the branch as the fitting on the pipe came loose. Lady promised me she will get us a new pipe from the supplier Bennett and she will phone me when she receive it. After 2 weeks on the 8th of August I phoned the branch and eventually got hold of the is lady who said Oh she got the pipe I ask her why she did not phone me. Oh I lost your name and number. Soon after my call I received a call from this lady who suddenly got hold of my name and telephone number and she informed me she don't have the pipe but she will get me a demo pipe but I must pay R 180. This was not on and I phoned demanding to speak to the manager. He said he will investigate and phone back. I received a call from a Sibosiso who said he ordered me the pipe and he will phone me in the coming week. Almost 2 weeks past and still waiting. This is not on. I now demand that they cancel this deal and pay me back the full sum I paid for this vacuum cleaner