Aggrieved and Unhappy Customer

Ordered supper on Saturday at McDonald's Cape Road in PE, order #1855, Grand Chicken Special burger was badly prepared and when I called in to complain, I was initially answered by Athini who hung up on me, I called back she answered and passed the phone to Shi Oliver who repeatedly called me mntase(Xhosa slang for Sibling/Cousin/Relative) to which I had to correct because we not related, I explained to her the reason of my call and she said she was gonna check the footage then call me back. She later called me to ask for my personal details and confirmed my contact details the same she was calling me on. That was the last time I got any communication from Shi Oliver to date. I asked her who was her Manager and she said it's Rene but forgot the surname. This entire experience has left a BAD taste in my mouth, excuse the pun. This is an Unexpectable BAD customer service as a company that prides itself of putting customers first, being customer centric and competent staff that deliver quality to its customers. Mcdonald's you can Do better, I could not believe the level of unprofessionalism I experienced that night. Mcdonald's you need to Continuously Develop your staff to keep them abreast with product knowledge and Prepare food that is of required standards. Again I repeat McDonald's YOU CAN DO WAY BETTER.