Easy Isp Change In Router

I have a D-Link 2750U ADSL router. I have two ISPs.
I want to easily change the ISP login settings in the router. Please help with either Telnet, A.R.S.E or AutoIt script to do this. OR maybe another elegant solution.
Thanks

 

How do you have access to two ISPs? Do you have two cables coming into your house?

 

This might help. On the face of it, you probably need a router with two separate WAN ports. But have a of it.
https://www.quora.com/How-do-I-switch-between-two-ISP-with-one-router

 

I buy data from 2 ISPs and therefor get the best deal going. I can change the amount I buy from each depending on price.
The only way I can manage it now is to reset the router ISP login manually ie logging into the router, editing the ISP details by typing in the details manually and applying the settings. A laborious process that takes about 3 to 4 minutes