Hello, I often use datacenter proxies. Datacenter proxies are IP addresses provided by data centers. They are typically cheaper but have a higher risk of being detected and blocked by Instagram. However, for simple tasks like unblocking Instagram, they may be sufficient. Some datacenter proxy providers include Blazing SEO, ProxyRack, and Storm Proxies.

Using proxies or other means to bypass Instagram restrictions may violate Instagram's usage policies and may result in your account being suspended. Therefore, I advise you to be careful with proxy services and choose proven ones. To find suitable proxies, you can conduct a comparative analysis of different proxy providers. Here is a good comparative analysis of different Instagram proxies carried out https://gologin.com/proxies/instagram-proxy