Decrypting your files is easy. Take a deep breath and follow the steps below. 
1 ) Make the proper payment. 
Payments are made in Monero. This is a crypto-currency, like bitcoin.
You can buy Monero, and send it, from the same places you can any other
crypto-currency. If you're still unsure, google 'monero exchange'. 

Sign up at one of these exchange sites and send the payment to the address below.

Payment Address (Monero Wallet): 

46WDbj1YCQrCfAGW37AJi3Ljr86waWBP1GwoRCeAGcR49xtNvRWpVyXQsqWDxW4qaQ5SxnDB4VnJZRhNaYHuvkAdVaeLeMM

2 ) Farther you should send the following code: fdghd7vjd7843hccs to email address skgrhk2018me@tutanota.com.
Then you will receive all necessary key. 

Prices :
Days : Monero : Offer Expires 
0-2  : 4 : 08/07/18 
3-5  : 7 : 08/10/18

Note: In 6 days your password decryption key gets permanently deleted. 
You then have no way to ever retrieve your files. So pay now.