You made a new contract based on the old one. 
for this combination you got the „Kombivorteil“.

Now the first Contract is gone also the Rabatt. 
 

BW 

Witti

My english isn't perfect...

That's correct..  

"I just get new contact after 2 year of my old contract finish." 

The "Kombivorteil" 50% is a discount for a 2nd contract (=Partnerkarte).  When the 1st contract is finished and deactivated the "Kombivorteil" ends too. 

Thanks for explain to me, ok I feel like scammed , probably due to language barrier maybe I missed that point., it can be my fault too, anyway, thank you both for the explanation. 

Anyway, I am still in first 14 days, I would probably just return phone and cancel this contract. That is terrible. 

If o2 give me some discount still may keep it the contract.

Regards,

Please cancle the Contract and Phone with an e-mail to widerruf@cc.o2online.de and send the Phone back

That's the best way .. 

Hello @refikcaner, welcome at our community. I am sorry that there maybe was a misconception

And I am sorry that I cant give you an oterh answer.

Kind regards, Ines.