Nightmare problem pd170 bmn.

Hi everyone I'm hoping I can be pointed in the right direction.
13weeks ago yes that does say 13 weeks the rac had to tow me to a garage were my pride and joy is still sat.
Reason for this is, on my way back from the local maccy d's pottering about at 50 all of a sudden my car cuts out no warnings nothing. I thought cam belt which when I pulled over was quickly eliminated. So Mr rac turned up and plugged her in, he managed to get some codes but he's reader said unknown????. So towed to garage...
My mechanic was adamant it was the oil pump balance shaft... I said no please plug it in as I thought injectors or loom. He went ahead changed oil pump which ISN'T balance shaft. Then he said tandem pump to which I said INJECTORS so tandem pump later and cam shift sensor he plugs her in. The codes he retrieved are p1267 P1270 p1261 p1264 p1269 and p1260.
Now after doing my research (12weeks of) I bought a new injector loom from tps and said try it as I can't see all 4 injectors going at once. So we / I tried the loom and still nothing. This is were I'm at,,, still hoping that it just can't be all 4 injectors. So here I am trying to see if anyone has come across this and has any advice. I would really appreciate it as driving my sisters kia at the mo and getting extremely depressed..... Thanks in advance ian

Thanks for the reply. I took your advice and contacted seat uk. They took my reg, and apparently there isn't any pending or past recalls on it.
So I sent a message with the part number etc and I'm currently awaiting a phone call from a customer relations manager. So fingers crossed

Mines a 2008 can't fault the car at all really besides the dpf and this current issue it's been spot on. Iv seen all the reports on Google and iv seen the prices of the injectors. My issue with seat is how can there be recall on these injectors 03g130073m which are highlighted in it yet my car hasn't flagged up past or present.