Poor customer service

I took my TV in for repairs at Game Kolonnade on 20 November 2021. According to their repairs policy it should only take 21 days. When I called for inquiries I spoke to a lady by the name of Sarah on 15 December 2021 on or around 11:34.She told me to stop calling because I am irritating her and that they did me a favour to have my TV repaired so quickly and that I should be grateful. She said that I can not ask her when I will get the TV back because the supplier is closing. My question is what favour is she referring to because it is on their policy to say repairs will be within 21 days. And if she gets irritated by Enquiries where does she expect clients to get information.