Trojan Virus found in our website www.sumadhwaseva.com

Today I received a mail from one of the viewers of my website:

I wanted to bring it to your notice that when we go to https://www.sumadhwaseva.com/? its getting redirected to some spam website so i am not able to access this website could you plz check on that.

So many people are writing that there is trojen virus in https://www.sumadhwaseva.com

please assist me