Very poor service and phone!

Today to you. Honor X7b 256G

With a lot of dismay, I write this mail to you with regards to the above-mentioned cell phone. I was extremely happy with the phone and had no problems. I have however started having issues with the Wi-Fi signals. My wife has a Vivo and no Wi-Fi issues, my son has a Samsung, my mother has 2 phones an old Huawei and also a Vivo and no Wi-Fi issues with those phones. I have to be 3 feet away from the router for it to pick up signal, if I walk away from the router I loose wi-fi so what is the point of this function if it does not work. I want it resolved. It has come to this point I took the phone to Vodacom to have it inspected and they tell me that I must leave the phone so that they can send it away and approx. 3 weeks I will be without a phone of which is a very difficult decision because my business is I need a phone every day for work in taking calls, sending mails and photos. They have no decent phone to loan me as long as my phone is in for the so-called repairs. I have had this phone for 122 days as per the device and the phone states I have 592 days of warranty. The issue is I am very unhappy with the service of Vodacom and this phone. I would like to know what do I do from this day onwards. It is getting worse by the day. I want to give back this phone back or my contract cancelled at Vodacom due to this issue. I am getting Vodacom and Hello Peter involved to get to the bottom of this. If I do not get good enough feedback I will be taking matters to the newspapers. This is unacceptable and I want the correct thing to transpire. I want either a new phone or cancel my contract with no strings attached. I will not accept the same phone I want a better phone and I think my request is not without substance and I would appreciate it that it will be sorted out at the quickest available time(NOT WEEKS OR MONTHS) BUT ASAP.