I keep running into this issue ... I'm trying to see providers such as:

Plan on contacting Tandee myself soon, so this is good to know. I am surprise that Estella Reed and Piper( your reviews) arent good enough references.

They will only copy/ paste and press sent on the reference you provide. If no response, no appointment.
Business is good and girls knocking on the door, so they don't need to mess with any other forms of screening. I've tried. Thinking they where different groups. There not, all one group and will stop responding after you try to schedule with different girls in the group. Adding to that I image that providing reference's for an independent would be quite a pain as well.

I keep getting told that they don’t give referrals and longer.

I'm having an issue getting Tandee to reply at all.

I give references as well as accept reference. I also offer alternative screening if needed. Please let me know if I can assist you in any way.  

For newbie friendly providers. Once you're established with them, they will be able to provide references for you.

I typically ping the women I am going to use as a reference and ask them if they remember me and if they are OK being a reference.