Metro by t-mobile Metro pcs Ask to have prepaid account closed 9 days before due All All

i called 1888metro8 to have my prepaid phone account closed 9+ days before it would be due to renew.. The agent assisted me and canceled my account with zero verification as to who I was or why I was closing said account. Afterwards I asked what happens to the money that I over paid seeing as I still had several days left to which she responded oh you forfit that money. How can this be seeing as if I upgrade the same service I am Charged a prorated amount, wouldn't that say that if I shut the phone off with 9 days left I should be owed something? I have been a metro customer for the existence of metro pcs something like 22 years and I do not recall ever reading this in the fine print. Metro is taking our hard earned money Unjustly and