Poorest Customer Service ever!

Poorest Customer Service ever! This company was suppose to come and install a DSTV Exploar purchased on a contract from OnAir. They don't follow up. They make appointments to come and install and it just never happens. I've complained several times with Multisim and OnAir and nothing happened! Basically sitting with a device which I am going to paay for every month and I am unable to use it. Please do not purchase from OnAir as their installers are not trustworthy and neither are they!