Worst customer service ever!!!

Hi I have ordered blinds from this company and paid my deposit by 24 August 2017. After numerous calls from about the 14th of September, I have still not received an installation date or any feedback by end of September. I then tried to get a refund on my deposit. Still no contact from anybody at the Blind Spot that could help. Apparently Allison is the right person, but she never gets back to you. Their installation guy then did rock up at my house while my domestic was home, but left with the blinds again, as I did not want to make the final payment without seeing the installation and product. After another 4 calls to their call center, and 4 e-mails, I still have not heard anything again about a refund or the installation. Regards Drikus