it is far too early for you to declare that taming is 'impossible'.
Please read through the Taming & Bonding
section of the forum where you'll find loads of stickies and topics about taming your budgies.
At two weeks, you should not even be trying to tame your budgies and unless you realise that you need some more realistic goals with budgies, you are going to be frustrated with your lack of progress.
You should leave your budgies to settle in for TWO WEEKS without trying to tame them.
Then you should sit and read to them with your hand outside the cage for about another week.
In the third week you can try opening the door to the cage, still talking to them but not trying to touch them.
At four weeks, if your budgies look comfortable you can start to put your hand in the cage, but learn to read their body language so you can tell when they are giving you the sign to back off.
You need to spend the next two weeks not trying to tame them and learning all you can about budgies by going through the stickies here.