Paid Full Price for a Half Sized Mcflurry

On the 1st of September 2022, I purchased an Oreo McFlurry from the McDonald's Florida North branch. Upon closer inspection, I saw the Mcflurry was roughly half full, literally taking up less than 50% of an already small container. I have had Mcflurries from various branches before to know that this was not the appropriate portion size. I tried telling the gentleman serving that the portion was incorrect, however he rudely dismissed me, and no further action could be taken as I was late for a meeting. I am deeply appalled by the portion size and staff treatment a PAYING customer, who has taken time out of their day to buy from McDonald's, has been treated. I know for sure I will not be going back anytime soon!