The link is always broken

I have to start out saying I actually liked the app and how it syncs with my store. It is easy and convenient to use but I give it a one star because of the security issues I've been experiencing. I have this app connected to QR codes, social media, websites, etc and it's a massive pain in my side that I have to switch to another service. I've had an issue for who actually knows how long, that my link is being hijacked by other businesses outside the US. When someone clicks on my link in any of my bios, it redirects them to another company. This could explain large dips in my sales over the last several months, so who knows what has actually been happening. I've contacted Shopify support three separate times about this issue and they insinuated it's a problem on my end with my browser, cookies, or cache. They also can't replicate the issue... To be fair, they can't even figure out how to view my Instagram account which has thousands of followers. So of course they were not able to experience anything I was seeing first hand. I've also tried uploading video with my phone demonstrating my issue, but they only accept a very particular type of video that I was not able to get correct even after downloading the specific app they recommended. I have an iPhone which should have been an easy and seamless upload. After the third complaint and zero answers as to what was actually happening, I've decided to move all my linking services to another company. I don't feel comfortable knowing this is a Shopify product and Shopify cannot give me any answers, if my store is secure, or why this is happening. I have decided to go with a third party paid service. I feel more comfortable knowing my linking and website are totally separate so it won't compromise my store in any way.