I’ve just sent a support request in to Tidal but thought I should post something here in case anyone else has had an issue.
I updated my SC5000M with v1.4 firmware and signed up for Tidal using the code generated. There were a couple of hiccoughs on the way and I needed to enter two different codes to activate Tidal. However, looking at my account on Tidal today it states “Your subscription will automatically renew 09/11/19. You will be charged £19.99 from your Paypal” which is clearly not three months away!
I’ll drop an update here once Tidal get back to me.