O2 Umzug, will the original discount be kept?

Dear all and happy new year,

I recently ordered O2 Umzug to my new apartment, and to save some money, I chose to extend my old contract to another 24 Months. However, I had a 4 Euro Rabatt auf die Grundgebühr in my old contract, but I didn’t see that in the new contract that I got via email. I asked an O2 agent via live chat, but he/she reassures me that he/she can see the 4 Euro Rabatt in the new contract. I am not sure if I misunderstood the agent or not, could I ask for the help of a moderator here, to see if the Rabatt will be included in the new contract or not? If it’s not, I’d rather pay the Umzug fee… Thanks in advance.