BEWARE Overcharges for International Plans $$$

This is a fact not a question but I can not find any other way to notify someone at AT&T who "cares".  If you buy a 30 day International Passport 1GB | $60.00 one-time charge and if you have previously bought a International Day Pass, you will be charged $10 per day on the International Day Pass even though you buy a 30 day International Passport.  For example, I purchased $60 for the 30 day International Passport from Jan 2 to Jan 31, if I used my cell phone internationally for 16 days between Jan 2 and Jan 31, I will be charged $160 even though the International Passport plan is in effect.  So my bill for international calling on this trip would be a total of $220 (in addition to my domestic plan charges).  I spoke/chatted with FOUR customer services agents (Rowe, Zyra B, Ricky G, and Alex T).  Alex T ended up removing the Day pass charges because of my "inconvenience".  They all said it was my problem since I did not disable the International Day Pass!  How is a customer to know this?  I have used both the International Day Pass (since I live very close to Canada and go there for a day or two at a time) and also the International Passport for international travel.  I have NEVER had this issue on prior international trips. However, I had always used customer service to buy the 30 day International Passport and the rep must have also disabled the International Day Pass (if it was enabled).  The last time I used the 30 day International Passport was in Aug 2018.  In Sept 2018, I spent a few days in Canada so I replied BUY to the International Day Pass via my cell phone.  I did not realize that this meant that the International Day Pass was enabled until I called in to disable it!  Even if I had known this, I would have expected the 30 day International Passport to override the International Day Pass!  The last time I purchased the International Passport the customer service rep said that I could do this online.  I much prefer online to avoid the frustrating & time consuming automated phone tree to get to a customer service rep.  So at the end of Dec, I logged into my online account and purchased the 30 International Passport but did not disable the International Day Plan.  Apparently MY BAD ... can't find any other way to tell a person at AT&T who "cares".  Hope this helps people avoid this issue and save their hard earned $$.