No option to choose activation date

I ordered the 5G rain router on 13 February 2022. It was delivered on the 15th of February 2022. On the day of delivery, my sim was activated and I never had an option to choose my activation date. I am currently paying for 2 wifi accounts because I was never under the impression that on the day of delivery that your bill will start running. I immediately logged a query on the 15th when they delivered my router and sim to ask whether they can start billing my account from the 1st of March as my other wifi contract will end at the end of February.

The call centre contacted me:

I was advised that my account will start running the day they deliver the router. I logged a request the day they delivered my router to attend to the matter and only received feedback 2 days later. and now it is all of a sudden too late to change. My sim card is not even inserted into the router and is still packaged.