The repair Desk in fourways crossing next to pick pay

Got my cellphone fixed by there shop to change battery on my Huawei p20 pro. After fixing it I noticed that they broke my back cover. I ask them how will they fix that broken back cover. They told me that they didn't have parts for my phone they will call me after a week when they receive my delivery. I waited and waited. No one call me I had to go back to the shop they kept saying still not received the parts because of covid ti today when I go inquire again. Only to see on other guy telling me that he bought the shop and he can't help me. They broke my phone and when I ask them to give me the details for that guy they bought from they started intimidating me.