To give another perspective, yes, you could ask for another proxy and it might work fine. I used to use HighProxies and they worked ok for me, I just decided at some point though to stick with my residential IP for the few accounts I've managed and that's worked ok for me.
If HighProxies still manage their IG proxies as they did when I had them, they are private proxies, meaning no one else is using the same IP address while you are subscribing to it, but that doesnt mean that no one else has used it before or what they were doing with it. I'm not even sure if HighProxies knows if it's been used before by another provider, but it could have been used by someone before you, they're just assuring you that (1) it should work ok with IG and (2) no one else is using it besides you. That usually works ok.
But IG uses other criteria to determine if an IP is "suspicious" meaning associated with inauthentic / spammy / undesirable activity. If the IP address geolocates to a data center, even if it's supposely certified and tested ok for IG -- even if it's a so-called virgin proxy meaning supposedly no one has used it before -- one might assume that a data center's IP is it's more likely not being used by a typical teen girl 'gramming her friends, it's more likely a business that is using that IP address. That doesnt mean it will be automatically banned or even blocked but it looks less authentic, and if others are using the same or very similar IPs and engaging in undesirable behavior it might reasonably look more suspicious to IG, even more because the IP is assocated with a data center. There are supposedly providers that offer IP addresses that appear to be associated with residential or mobile ISPs, and do-it-yourself ways to do it, but I don't know details of what advantages they offer.
I would first suggesting stopping your bot, trying to log into your accounts from another device (and a different IP), doing what verification you need to do to authenticate and get into it, and try to restart your bot. You may just need to assure IG that no one else has taken over your account and that the actions your bot were taking were yours.
Also, if you don't have your accounts logged into on a mobile device (phone, tablet, etc) using a proxy app that can allow IG to communcate through your proxy (and so appear to be logged in with the same IP) I'd suggest doing so. After you get into your account(s) ok, try restarting the bot -- you may not even need to change your IP at that point -- and if needed change the IP or consider other options.
I am logged into my accounts with the IG app on an android phone using the same proxy, so if IG wants to send me a message asking me if I authorized the login or activity from IP/location "whatever" I can indicate it is authorized, and avoid having to do more to authenticate by email or phone, etc. If you need more help with doing that please ask, I am not online much but I'm sure others here can help you do likewise.
