Help with wiring

[Barry2020]

 

My son pulled out a cable I think and my broadband is no longer working. Could someone have a look at the picture and advise me on what I need to do? The blue and the white wires connected in currently where definitely connected in there, just not sure which side each goes to. Also some other wires may have been connected. 
not using telephone - just broadband needed. 

thanks very much 

[licquorice]

No picture

[Barry2020]

Thanks I had to compress the image as never posted first time around. Now In the post. Thanks

[licquorice]

It doesn't matter which way round the blue and white go. Are you sure they are the incoming wires.

[Barry2020]

They were definitely connected in but I thought there was another few connected....

[imjolly]

Are you a BT broadband customer?

is that the master socket where the incoming openreach cable is connected?  If so is there any wires connected to terminals A and B?

lot of cables so is there also extension sockets in your home

[Barry2020]

Yes with BT and that is master socket 5C. No extension sockets as not required . Thanks!