Thanks Andy, I called them and they refunded £30 :-)
I used the code this afternoon and it took the price down to £269 for the 64gb black pristine
Now news portals will report all sorts with no evidence but TRAI wont hype but give actuals https://indianexpress.com/article/technology/tech-news-technology/5g-expected-in-india-by-2022-trai-5481790/lite/
Anyone else use the Janblues code for £30 off, it is accepted, then pay and the £30 was added back on? Grrrr.