GSPC — Installation not done

I have file complaint about installation of new gas connection. I have file complaint around 7 December 2021. I didn't get solution yet. When I called customer now then asked me to go to gaps office and when I go to gspc office then they are saying it's in progress just wait.. And when I go third time office then they asked to contact builder. When I go to builder then they telling that you need to visit gspc office

So kow I am not sure where I need to complaint to get work done.