That is very unusual. did they inject adds onto your website?
Because the only one’s i’ve used with a ticket system either injected adverts into your site (so you were paying with advertising space) or for SquareSite they were forever pushing premium
Taking a look at your site, it looks like you’re trying to run Laravel. This doesn’t work well on Infinity free. Because there are some limitations that impact it. But I assure you its not because of the ?i=1 at the end
Admin posted about this a while ago, so these 2 might help