Not so good Huawei Service. 3 stories, 1 service provider and 0 accountability

I bought a Huawei P Smart dual sim 2019 last year August and had to fix a damaged screen in October of 2019. I took it to the Melrose Arch branch for repairs. A year later, the phone cannot detect sim 1 or 2, there's no physical damage to the device. It just stopped working. I than went to the Menlyn branch and they advised that the would need to fix the main board of the device. I than proceeded to ask on what could have possibly caused the damage,and I didn't get a straight answer. My issue is being told that the Melrose Arch branch might have canceled my warranty when I went to fix the phone in 2019 , than a Huawei Whatsapp consultant advised me to go to the Menlyn branch and ask for the manager when I stated my issue. Than I also opted to calling the customer service representative, which said that the phones warranty could not be canceled within the 24 months, but when I provided him with my IMEI number he confirmed that it had not being canceled but infact expired. But later rectified the statement that indeed my phone was only activated in August 2019.And it was still within the 24 months warranty. He also advised that he would escalate the matter to his senior. Today, a day later since I reported my issue. One of the senior consultants comes with a different story that my Hardware warranty was only valid for 3 months. Which none of the Service providers disclosed to me. I than asked why no one had an answer of how the sim 1 just stopped working, within the 24 months of purchasing the phone without the phone having any physical damage. She also said she doesn't know but she advised me to get an expert to assess the phone. I should get an expert after I had taken it to a Huawei service center,and could not get a straight answer on what could have possibly happened. I still need to get an expert to assess the problem. It really baffles me that they know what the issue is, and know how to fix it. But no one has an idea what possibly happened for 1 of the sim card slots to stop working. 3 different stories about warranty. 1 service provider. ZERO answers. Sad part is that I made sure I only went to Huawei. Zero accountability