Can I buy 9.99 plan without the auto renew option

[dalyer]

You mean this offer? 

• https://48-months-cdn.s3.eu-west-1.amazonaws.com/promotions/%E2%82%AC9.99OfferTCsAprMay26.pdf

As you can see there, having auto-renewal enabled is a requirement in order to qualify for that promotional offer.

3. The Auto-renew feature on the account must remain enabled to avail of the 6
consecutive discounted plans at €9.99 per month. If auto renew is disabled while there
are still €9.99 plans stacked on your account, you will not be able to avail of the stacked
€9.99 plans and your monthly plan price will be €12.99 upon your next plan renewal
date.

If you need to contact 48 support about this then see the links in my signature below.