Movistar deceives my parents who are elderly. Sinc...

Movistar deceives my parents who are elderly. Since August 20, my parents have unsubscribed with movistar / telephone and have received a bill of about 200 euros when the normal monthly payment is 100 euros. The best of all is that today they continue to invoice the bank as of September 29, 2020. We have been calling since September 1 to contact and it is impossible for anyone to come to me with the appropriate department to solve it and they tell me call 1004, the 1004 if you are not one of them they will not let you do anything. I hope a solution for my parents !!!