Payment problem

Groupie

Payment problem

So I paid for Todo mexico Plus on 7/17 and my original plan of 35$ is due the 22nd. I added $35 to my account since I thought I will have to pay the Mexico todo plus next month. Now on the 7/23 is asking me to pay $40??? Why cant it just pay the 35 and I can pay the $5 on the 8/17 since I got it on the 17th??