URI problem with query string like URL

[eluser]Unknown[/eluser]
Hi, i'm making shop and i'm using system that indicates if users credit card is acceptable or not. System requires accept and discline url to be defined. After adding some info it redirects users. So if i define accept_url to be http://www.mypage.com/index.php/shop/accept/ they redirect user to http://www.mypage.com/index.php/shop/acc...570C37B713
Is there way to access all accepturl?Order=xx&Amount=yyy&Currency=rrr&Transno=zzzzz&Validatemd=AD6F2A602DA7FAE5435B90570C37B713 thing, since $this->uri->segment(3); only gives accepturl.
I use

Code:

$config['permitted_uri_chars'] = 'a-z 0-9~%.:_\?&-=';

and i don't use .htaccess.

[eluser]Phil Sturgeon[/eluser]
Please use the search function. There is one on the forum, the wiki and built into your favourite popular browser.

One of many answers to this question

[eluser]Iván Argulo[/eluser]
If you can talk with the support department, maybe they can do post of all data, instead of passing parameters by URL.

Some providers give that option; we did it for a SMS notification gateway, and it was easier to implement...