Terrible service

This is not the first time this has happened. Kfc got bad customer service agents working for them as well as poor service. Am disappointed on how there treat customers. I have raised a case *** on the 2nd of april of which still not resolved. I keep being told about 7 to 14 working days. On the 9th I received an email to send bank statement so I can get my refund of which I did immediately. But today i received text massage asking me to call them after giving them ref number on the text the young lady on the line name Sjaan said i haven give her someone else details. I then give her my original case number she advised me on her system it shows an email was sent out today asking for my bank statement.I told her I got the email on the 9th, Sjaan insisted it was sent today. She kept speaking over me and calling me Sir while am woman.I told her not to call me that, she still didn't listen to what i was saying kept reminding me of 7 to 14 working. I am so upset it not even funny i request to speak to a manager i was told she is still busy i will receive a callback. I got a callback from Intusekgo saying she was the Manager. She will be getting this sorted for me. The level of poor service