Hi

My extender will not work since chaging ISP

I went from sky to vodaphone and using a HHG2500 model router

All worked fine with sky broadband then changed to vodaphone

I tried all options to connect i.e "quick setup using WPS button" and option 2  - "quick setup using web broswer" , tried both multiple times but nothing works, the blue light signal is lit up and staying lit but there is no tplink extender in my connections list to connect to - i reset the extender and it shows up but can not connect to it, I repeat process and same happens

is there anything I need to do in my router settings?

or any other tips to get it working?

Thanks