Poor service !

Hi, on the 24 Dec 2015 I called into the call centre (114) and asked if I could upgrade early as my phone had been ******. I discussed my current package and I asked if I could get more data but less minutes and she said no problem. Now I see I have been down graded to Smart M (I was on Smart L) so now I have less data. Please go and listen to your voice recordings for that day, and listen to what I agreed too (free minutes and data amount), and then please explain why I am getting less now. I agreed to receive less free minutes and 800MB data, but I see I was only credited with 300MB.