i TOTALLYYYYYY relate with you!! Bella was like that for a long time! She peed on the pad but never poo... so this might be grose but it kind of worked! I put the poo in the pad when she did it in the wrong place that way she knows where it has to go!. I did that for a while till one day she did it by herself and i gave her treats and all kind of love! Every time she did the righ thing, i gave her something really delicious!! Also i looked at her schedule and between what times she would poo and I put her in a small area where the pee pad was.
It is very very frustrating and when they do the wrong thing! it makes you sooooooo mad but then you look at their little faces saying IM SOOOOORYYY!
AND ears down that i couldnt be to mean to do anything than say NOOO BELLA
It definetly takes time and patience you just have to watch them 24 7 and hopefully they will get it one day! It took her a while to understand!