Store Manager bad attitude

I have recently visited your Chicken licken branch at the Smith Street in Durban Kwa-Zulu Natal. I had an issue with my order being delayed as everyone else whom had placed their order 10 mins after me had received their order. Yet I was still waiting. When I brought it to the attention of the tall Indian Manager at the branch. I was spoken to very rudely and told to wait for my order as it had taken longer to wait. I was brushed off after waiting a very long time and was spoken to abruptly in front of other customers. I was appalled to see the Manager behave this way only to look directly at him to see that he was high and smelt of drugs. I'm shocked to learn that such a brand dealing with food for people employs people of such standard. I was spoken to very badly and insulted in front of other. Customers. I understand that the store was busy. However I don't think waiting over 15 mins for my food and then being told that I can see the store is busy and that the order does take longer to make is acceptable. There's a reason this is called fast food. I seriously suggest that the Manager of that store take a lesson in customer service and the company conduct a testing of drugs on the Manager to support my claim. I am a very disappointed customer. I have also notified the complaints bard regarding this. As this is unacceptable.