Gas delivery problems

Since we moved to a different part of Bangkok a year ago, we've been using the gas supplier that our neighbours use, but there is a problem almost every time. Either they turn up really late or not at all, or they just say they have no delivery staff, leaving us waiting. In the meantime we can't cook (no microwave etc). They won't leave a new canister if the old one hasn't been returned, supposedly to stop people stockpiling. Although our neighbours always buy two so they are never without gas....

At our old place, for over 5 years, the gasman turned up without fail within the hour or at least the same morning, weekends included. So it is really wearing having to battle to get gas here. We live near Thong Lo BTS.

Can anybody recommend a reliable gas delivery company?