RAIN INTERNET PROVIDER SO IRRITATING

I SUBSCRIBED TO RAIN WIFI INTERNET LAST FROM LAST YEAR.SO THIS YEAR IN FEBRUARY MY AREA GOT FIBRE.SO I CANCELLED MY SUBSCRITION TO RAIN THROUGH THEIER APP,END FEB AND I CALLED THEIR CONTACT CENTRE BUT NOONE ANSWERS ,TRIED SEVERAL TIMES BUT NOONE ANSWERS.SO I REALLY DONT KNOW HOW I CAN CONTACT THEM TO CANCEL THE SUBSRICTION,EVERY MONTH THEY ARE TAKING MONEY FROM MY ACCOUNT.THEIR APP IS MULFUNTIONING I TRIED SEVERAL TIMES TO CANCEL BUT TO NO AVAIL.IF PLEASE YOU CAN CONTACT THEM FOR ME.