I’ purchased a bunch of Seinfeld episodes

I’ve purchased a bunch of Seinfeld episodes individually for many different seasons (more $ than it would cost to buy out complete seasons or series). I’ve often seen an option to buy out the remaining episodes to equal the cost for the complete season up front.

That option doesn’t appear to be available to me anymore.

Does anyone know why I can’t I get credit, or “complete my season” anymore at a discount?

…and if I purchase the complete series (for $100), does anyone know if I will get credit back for all the individual episodes I purchased at $3.00 a piece?

Thanks for the help!

Ap2kLV