FEATH-R-LITE Inflatable Paddle Board Stand Up Paddleboards for Adults SUP with Two Different Configurations of Accessories

How do I get replacement fins for this board? There is no option to message the seller.

How many air chambers are there?

How do I contact the seller? The directions given in a previous question don’t work. I don’t have the option to select problem with product.

I can't seem to find a way to contact seller but the glue was missing in my repair kit. I don't need to repair it but would like to have it on hand