I did not subscribe to MTN entertainment service!

I received an sms at 21h32 on 6th July 2020 (while sleeping) advising me that I have subscribed to Hungama Play. At 02h00, a little while ago, I received an sms that I will now be charged for the service. R5 was charged for subscription. MTN, please let me know how I subscribed to an entertainment service whilst asleep.