I would have to agree with launchretrogirl2562. Posting your csv file, or least a few representative lines would really help.
For myself, if I had that same situation, I would write a custom parsing script and write out a platform xml file directly, or if you don't have the coding skills, use one of the AI online tools that is good at writing code. You would probably have to upload a short example from Launchbox so the AI knew what syntax is required, then your csv file. You should get really close doing that, and it may work straight away.