Who contact when the solution to a training problem is false?

to lichess.org/training/37165

Problem 37165

1. Rb1g1 - ng4
2. Qh8+ - Kxh8
3. Re1 - nf2+
4. Kg1 - nh3+
5. Kh1 - Qf1+
6. Rg2g1 ! (and not Txf1)

Your false solution erase me 20 points, it's possible to give me back? How 16 593 players (04.13.2016) are playing blind? ;)!

Original:
1. Rb1g1 - ng4
2. Qh8+ - Kxh8
3. Re1 - nf2+
4. Kg1 - nh3+
5. Kh1 - Qf1+
6. Rxf1 - Rxf1+
7. Rg1 - Rxg1#

Your "best" move
1. Rb1g1 - ng4
2. Qh8+ - Kxh8
3. Re1 - nf2+
4. Kg1 - nh3+
5. Kh1 - Qf1+
6. Rg2g1?? - Nf2#

Get it?