UPGRADE WAS NOT DONE BUT DEVICE WAS RECEIVED

I have upgraded last month and this month the new data has not been loaded and I still need to pay and I have upgraded specifically to a high data usage as I need this for work. When I phoned this morning to hear what the problem is the blame was shifted to Ram couriers but the proof is there that I have signed for the package. Now I need to pay more for lesser data and I have the new router. and on this same data account I had 510 VB and when I have logged in in October I was left with 51 vb and did not even use them.