Inconsistent

I have an account with build it mkhuhlu for my RDP project..ever since I started buying from the they give us a hustle when coming to deliveries..even right after calling them a number of times to make deliveries they do it at their own time..I bought 320 bags of cement on the 11 October 2017 ..they were short with 160 bags and today its the 23rd of October I'm still waiting for them even right after calling them a number of times they just give empty promises which give me no option but to close my account with build it.