Telecoil and Bluetooth are two different things. Phonak automatically have the phone via telecoil on Phonak aids. You can’t get to the program via your program switch, it switches by using a magnet. That is why your curtains are activating it. Just get the audiologist to delete the program.
There is a public telecoil setting and a tv telecoil setting plus also the phone via telecoil. They are all for different things. You may not have the public telecoil setting but you definitely have the phone via telecoil setting as I had to delete that program on my Nathos Auto.