Well, you COULD have done a Google search, couldn't you?
If you had searched for - say - "reset button for a beko DRVT71W", you would have fond this in the first few results.
https://www.youtube.com/watch?v=uWtRXie82oY
Now, it may not be exactly the same on your machine but it would bea good place to start. With a little thinking around, you should be able to sort things out.
Anon, August 2016