Esim not available to customers with Top Up Contracts!

I upgraded two weeks ago to a s21 + and the active two watch LTE. The reason I took the watch was too also activate the esim.

Today I enquired within a vodacom store about the esim activation and I'm told it's only available to open line contracts and not top up contracts.

When I asked what happens to customers like me with top up contracts I was told it's Vodacoms policy and I should take it up with them.

Could someone please assist me ?

How does this make any sense and what happens to customers who have top up contracts and want to activate the esim ?

Please advise.