How can I fix 'The installer information on the recovery server is damaged' error during macOS High Sierra installation?

Hello everyone. I’ve just received my MacBook a few days ago from repairs for corrosion damage, the damage being corrosion and the ic chip being replaced. I’ve been using it since the repair. I want to daily drive the MacBook however some apps are not as well supported so I wanted to update to high sierra to get more life out the device. I have proceeded to go through with the update, in the middle of the update I plugged it in because I was scared of it dying, after a while it came back and gave me an issue that it didn’t install there was an issue. It has stated to use said keys to go into diagnostics however when I did so everything was “all good”. I tried rebooting and seeing if I can at least use the os it came with. Come to find out the official macOS update I did completely nuked my current install of sierra. So I proceeded with data recovery and reinstall however when I try to reinstall Sierra I get the following error stating “The installer information on the recovery server is damaged.”. I’ve tried to change the time and see if that helps however I get a new error stating “No bag entry”. I’ve tried to reinstall high sierra I’ve tried to reinstall Sierra. I’ve tried it all and I get more and more errors I’ve even got one stating apple support -2005f. I’m so stuck and lost. I really really need help please.

[Re-Titled by Moderator]