Mica Hardware ripping us on gas refill

<p>I took my 4kg gas to mica hardware in norkem park bichacres for a gas refill 15 may. When I used my gas yesterday on my heater it only worked for less than 5 minutes and the gas was finished. I couldn't call mica last night as the shop was already closed. I called mica this morning and the manager by the name of krishney said she is not going to do anything about it I can go to hell. Can the owner of the shop sort my gas refill and the customer service etiquette of this manager. During my call Krishney kept saying are you the one who called yesterday complaining about your gas that worked for two hours. I said no, and asked her to investigate this matter as I am not the only person complaining about the gas that was not filled. Can the owner attend to my matter , feed back. </p>