My account is suspended and I don't know why...

Hello my name is Dave. Today this morning I tried to login to my account but I wasn't able to... because for some reasons It's suspended... It said that I will have an email about it, but when I went to Gmail, nothing there... so then i though what if someone login in to my account and both some RP, so i went to Paypal but still nothing, last time i bought RP was 10th of March 2016. So right now I'm trying to feguar out whats going in on... Well maybe I'm banned because some people reported me? Last night I played 5 or 4 rank games and I lost them all... (I did a lot of mistakes there... xD but we had some trollers as well like Taric Top...) So maybe my account was suspended because of that? So if anyone have an idea whats going in on... Please help... I spend a lot of money and time on my main account... so I don't want to lose it because some stupid people think its okay to ban team mate for nothing...

UPDATE

My account is back but I think Riot ripped me off! I went to "My Ticket" in Riot Support and i wrote the problem and next day i had replay that saying i bought £20 but didn't pay, but i haven't bought any RP this week or last week and my account got suspended on 27 March 2016 so Riot just ripped me off...

Screen shot of my Paypal http://prntscr.com/alyk9m on 29th March I send GBP 20 to get my account back

Screen shot of my RP history in League http://prntscr.com/alyjnw