Hi Shaun, thanks for the info!
First of all, I think you have posted in the wrong thread since here is for TerraWorld Lite!
TerraWorld Pro thread: TerraWorld 2021 - Automatic Level Designer for Real-World Locations
TerraLand thread: TerraLand 3 - Streaming Huge Real-World & Custom Terrains For Open-World Environments
And based on the AssetStore guidelines, whatever you mentioned here is regarding to products’ support which you have to contact us through the email we sent you earlier to solve your issues instead of asking for refund here!
Also from these pictures, we cannot decide on what’s happening in your project and there are already thousands of users that use these products in their indie to enterprise applications without these issues.
So either contact us for support to solve your issues or if you insist on refund please ask the AssetStore team to process your case since we have no enough support and QA history of your case to issue refund!