In the customer panel, I cannot extend the duration of Domains

Oldies but goldies
1

Hi

I cannot extend the duration of the domains I want to renew in my customer panel, domain list.

Since I buy domain names in bulk, the option to renew is not available except for the option to renew them in bulk.

For example: I bought 20 Domains on the first purchase. But I want to renew 5 domains.

But I cannot renew these 5 domains, it constantly prompts me to pay the bulk bill of 20 domains.

Please I need your urgent assistance in this matter. My domain names will expire.