Which CMS to choose for selling video game keys to Western buyers?

Question

Online shopping

It is necessary to make an online store for the sale of digital activation keys for video games. The number of positions is more than 10,000 and will continue to grow. There will be integration APIs directly with vendors. Sales to Europe and the states (from the CIS only stray if). There is a marketing budget, the estimated targeted traffic is from 1000 people per day. More are planned. The company is also from Europe.
I collected it on Joomla + Hikashop 5 years ago, it worked, but it was a gluttonous clumsy monster with a bunch of plugins. As a result, about a year ago, something was updated somewhere, the plugins became incompatible, and everything broke. I don't want to fix it, I want a normal stable system, preferably for a year.
The question is, which CMS in the modern world to choose for these purposes? Is it even worth thinking about developing a custom solution from scratch? Safety is very important, because. the digital content sold is partially stored in the database, and it has value. API access keys from suppliers will also be stored. Cloud solutions are not considered.
There are no programmers on staff. If you do, then to order, and those. I think support is also outsourced for the time being.
If the CMS, according to what I read on the Internet, likes OpenCart more, because. There are useful ready-made extensions. I like Prestashop less, although I dealt with it a long time ago, but there are fewer developers. But I'm afraid to put together a stupid slow Frankenstein again.