time stamp not correct

In the mail message order-creation-notification the time stamp of the mail header does not correspond with the time in the message. Difference is 2 hours. The mail header is correct.
How to fix it?

Hello,

You'll probably find a solution through that thread : www.hikashop.com/forum/4-how-to/8885-email-time-adjustment.html

Hi,
The time displayed in the email should be offset using your joomla configuration's timezone option.

You can always edit the emails via the menu System->Emails (in the Business edition) and change the time display function from:
hikashop::getDate(time(),'%d %B %Y')

to:
hikashop::getDate((time()+XX),'%d %B %Y')

where XX is the number of seconds of the offset you want.

I am using the Basic version and tried to modify the order_creation_notification.preload file but without result.
It seems to me that the instruction you mentioned is about day, month and year.
I also tried to modify hikashop_getDate(time(),'%H:%M')) to hikashop_getDate((time()+7200),'%H:%M')) but also no result.
Am I looking in the right file?

I fixed it.
In the order_creation_notification.preload file I had to modify hikashop_getDate(time(),'%H:%M')) to hikashop_getDate((time()+7200),'%H:%M'))
Many thanks