If you sent an email, it might have gone straight to spam, even if you sent it via their website. So, a follow-up text is usually helpful.  

 
If you sent a text, maybe the same thing happened, or maybe the ladies were out of town. Or maybe they prefer younger clients? There is so much that happens it's tough to say what the cause is. On the few occasions that I did not receive a response, I will follow up with, hey, just checking and then usually also try an alternate method of contact.

I have met about 6 new providers in the last 3 or 4 years, and used email each time, or their contact form on their websites.   Maybe there were 2 or 3 that never responded, or vanished after the first reply, but that would have even "back in the day", this business being what it is.   These gals were mostly youthful ones.

 
It is sad if age alone becomes a barrier to meeting new providers, but I suppose it is possible.   Do your best to convince that that you are young at heart, and hope that they are open minded.

I recently got back from a trip to Texas and wanted to ensure I had a good time.  I started around 3 or more months ahead.  I went through the listings on P411 for the areas I would be.  Skipped ones that seemed to be just visiting.  Then went through the remaining ones trying to focus on ones that appeared to be close to the area of the city I would be in.   Then I created a shorter list based on rate, reviews, and what appeared to be their volume.  Ones that has ads all over the Internet I mostly dropped.  Then I sent each one remaining a PM also hinting that they check my profile for more information, and to see if they expected to be available when I planned on being there.  Ones that didn't respond were  dropped.  Ones that checked my profile, where I give some hints on what I'm into, and responded very ready to meet moved up on the list.  Then when the time got closer, I checked in again to verify if they still expected to be available in the area.  Then once I was ready to lock in a day and time I would send an appoint request.  I usually try and sent the appointment request at least two or three days in advance.  Ones that then didn't log in and get back to me I mostly set to exclude and/or block from future consideration.  Any that logged in but ignored the appointment request I typically report to P411 for jerking guys around.  

Bottom line is I ended up with more quality ladies than I had time to see.  I was able to see everyone I had originally wanted to except one. I was very impressed with the number of high quality ladies in the Houston area.  Rates are better too.  In fact, two I even gave an extra $60 too above what was agreed to because they went out of their way to see me.  

Bottom line is it is best to plan ahead and also have at least a couple of alternates selected because things happen and there are too many unreliable ones around.....even on P411 sometimes.

it's an age thing, just tell them you are younger by 10 or so years!
But you should be able to perform and look the age you are claiming.