Too late to text back?

Here's the link to the thread Lily:
https://merb.cc/vbulletin/showthread.php?127910-texting-etiquette

Well if you are adamant about not using your phone for business under any circumstances, then no you shouldn't reply otherwise you are opening yourself to more ppl contacting you by phone. If this can affect your personal life, don't bother

Technically he called the "wrong number" so no. If you are trying to order pizza from dominos and you get the wrong number, you don't expect that person to provide you the correct dominos #

If you have used your phone in the past to get contacted, then they did do their homework (not well) then in this case you can at least tell them "please contact me by email"

Have you given out your number to any of your clients? Maybe they shared the info.
A quick reply like "wrong number" is harmless since they will either stop or keep doing research and find your email

Well, my opinion on this is that it is unwise for a client to text or call a Indy with a phone that you share with someone you don't want to know about your hobbying.
When you text/call an Indy (especially an indy), you should not expect an immediate reply. It may take a while since she might be busy, phone closed because she is in a session, or has completed for the day or week...
It is not like dealing with an agency that have a booker available 24/24 (or almost )

I myself use a hobby phone OR, in some rare case, a free text application like textme that I configure not to show message on locked screen (but still give a sound when new msg arrives).

I really like to book by text and sometime, It takes a while to receive a reply back because the lady is not available at the moment I text, like in your case...

Also, It happens that I like to do business with real Indies for the exact reason that I like to text/talk directly to the lady.
Eventually, when the chemistry is strong, I like to exchange sms with her since we become good friends.
I like to receive unexpected msg from my prefered SP saying she's available today, or just to wish a happy bday, happy new year, happy hollyday or just to say hello.

In your particular case Lily, since there has been a long time you did not reply, you probably should forget about those.
Especially if you believe that it is not appropriate to use SMS / CALL for client privacy issues and especially if it is mentioned in all the place you advertise that it is mandatory to use email as the method of booking.
If you don't really like SMS yourself in your SP work and actually close your phone during non working period, then forget about those missed calls/sms.
(But I still believe that people that use SMS for contacting a SP should not expect an immediate reply... no matter how long the reply takes)