I want to change my website into on of these templates again

Dear All You - Team, 

a few days ago I started to design my Website. I choosed one of these templates and began to costumize my website. The Problem is now that I want to change my website into on of these templates again but unfortunately it doesnt look like the origin template. I cant cancel my customysation and I tryed to reset my website but I couldn't find anything. 

What should I do. Basicly I just want to reset all I have done on my website and start from zero. I really want to use youre " Ico " template, because I would like to open images into a new page. 
I was thinking about to delate my account and to sign up again to refesh the website but I was not sure if that is the best way. 

I would be happy for a response . 
Ps, your website is great !!! 

With best regards 
Oumi