If you fail to let the IQOS Customer Care Team know, they will assume that you’re happy with IQOS and the automatic charge will go through on the 25th day after your trial order was placed.
If you have informed the IQOS Care Team of your decision to return IQOS but you have not returned your device within the 34 day period, you will be charged for the cost of the device on the 35th day.