10 days is a lot and could be a problem.

Payment not guaranteed is a problem.

About the 10 days deadline,

first of all, a shorter deadline will get the best designers working for you as soon as possible, a long deadline would just make them postpone again and again until they forget about it.

Second, designs will come in a lot quicker when the deadline is closing in.

And third, a week from now, we would hardly find your contest, it would be on the 10th page or something like that, that can't be good.

It's your decision but i assume you want the job done as soon and as good as possible.

I would like to change my deadline to 3 days please, we are very pressed on time. 

It should be easy enough, i've seen it done by many others before.

However, if you don't find out how to shorten the deadline, you can just leave it like it is and end it as soon as you find what you're looking for.

Hello,

Could you give us a feedback?
Thank you in advance.

Regards

Hi

Your feedback would be much appreciated.

Regards