Bittle no longer able to connect

I'm trying to use the bittle but upon boot up it's making the first melody in the "Decoding the Melodies" video whenever I try to calibrate it it won't connect and whenever I try to factory reset it it's caught in a loop asking if i want to reset calibrations, any advice? it also no longer connects via bluetooth the sensor is red and makes the same beeping noise no matter what's connected