Hey I am looking for a way to post instagram pics via proxy

So I recently bought some instagram accounts but i want to delete the 1 picture that is on it and upload some myself but how do i change it using my proxy server. Any way to use a proxy on my phone or another way ?

Thanks for helping

Deleting will be the tricky part at least for free, for uploading there are quite a few tools, you don't even have to purchase anything, you can do it with GMT2: https://www.blackhatworld.com/seo/beta-instagram-automation-bot-gmt2.940121/

So deleting is not an option with this bot?