I noticed how the Roaming Add-Ons can be very frustrating in many ways, and here's what PM should do to make it better, in the Interrim:
IF U have a Bundle, and REQUIRE MORE Data, or RENEWAL,
BEING able to Purchase Additionals, and having it timed to take effect WHEN the 10 Days are up, or ADDing More Add-On Data Roaming, to make things easier and bearable in the Interrim