Contract extension without phone

I received the below email from o2 

"

Thank you for your request to extend your contract with o2 employee benefits.

We have good news:
After carefully reviewing your current tariff and its use, we have put together a tailor-made offer for your contract extension. This means you can continue to benefit from first-class services while keeping an eye on your costs. 

Please note: The new o2 Mobile tariffs do not include a free Connect option for multi- and data cards. However, this option can be added for €5.00 per month, which means the offer price increases accordingly. Since your current tariff includes a free Connect option, we can subsequently activate this in your new tariff. However, the changeover takes some time. As soon as this has been done, you will receive a credit on your customer account, and your monthly bill will be reduced by €5.00 from that point on.

"

The package I want is o2 Mobile L (2024), 100GB with  a connect option on the email I received a response from like this, but I requested a free connect option because I am already using multi-cards and do not want to pay extra for it 


Now I have a couple of questions

1. My current contract expires on March 27, 2025. I want to accept the offer now, but I want to start it after my current contract expires. Is this possible?