No customers service with rude staff

I have been purchasing 1L and 2L milk bottles from Westpack for almost two years now. As my business started growing the quantities of stock I took increased during this period. Better pricing on bulk quantities have been established with Alberton, Ridgeway and Van der Bijl branches. However, there always seems to be problems with Alberton branch.

A lady at headoffice called Tuane' or Duane' have helped me before with store complaints - which is no stock, poor service, rude staff (staff discussing customers) etc. Two week ago this have been solved and I received excellent service for which I complimented the store. This happened because me as a customer had to get on top of a ladder myself to get stock from the shelves. After many calls and arguments, it was established that my stock would always be in the back for me to collect myself as the staff refused to help. I was okay with this arrangement as it only took me about 15-20 minutes to pick up stock, pay and leave. However, yesterday when I got to Alberton branch, there was no stock kept in the back and when I went to the shelves there was a sign stating they were out of lids. Firstly I would like to ask you do you order bottles without lids? I then found a pack of lids hidden inside a cooler box standing close by. After I collected the stock and went to the cashier to pay, there was bad attitude from the floor supervisor, (please note that this attitude has been happening since the first time I complained to head office). When I left the store I called head office again but no one was in to help me. I called this morning (Wed, 21 February 2018), asking if I could speak with Tuane' or Duane'. The person on the other side asked who I was and by mentioning my name, was told Duane is not in. The phone was put down in my face. I called again and asked to speak with Duane' but was told that this person does not work there, again the phone was put down in my face. I am so tired of this branch with its *********** staff members and head office who clearly fails to help unsatisfied customers. I have tried to contact the owner Chris, but to no avail. Since when do you as an employee have the right to discuss customers, their clothing etc.? Why is it that we as customers do not have the right to an opinion. I treat each and every customer of mine as if they are the only customer I have. Being unemployed (over qualified though) for the past 3 years, I have tried to set up my own business but always have issues with this particular supplier (branch). The first complaint I had was no stock and incorrect ETA's for stock arrival. The second complaint was rude staff and thirdly incomplete stock. I will however take this complaint to all social media platforms