Poor customer service/incomplete box

The box does not come with instructions but rather a code to download the online course. The course costs $19.99 without the code. Unfortunately, the code does not work. I’ve sent at least 4 emails asking for assistance. I received one response but it didn’t address my issue. And when I emailed the individual right back, there was no further response. I’ve sent screenshots of the error code but there has been no resolution. So, now we have a box of pieces but no idea how to put it together. We were excited about this box and I’m really disappointed that this has been our experience.