Over charged

Me&You accounts department are not doing their job .I chose I 5Gb data by mistake and I called the same to cancel the data plan I was told its cancelled to my surprise I was billed for 5Gg data plan I called and asked whats going I couldn't get a proper answer and I was told its cancelled and the next month I was billed for 5Gb data I called told them they are inconveniencinconveniencing me and the said I will be refunded my money and it will take 7 to 10 working days and i waited for more than 10 days I called yesterday to find out why is the money not in my bank Account ? I cound get a clear answer I was told the money will be in my bank Acc . guess what when I Wake up this morning Me and you Mobile debited my Acc again instead of a refund .Meandyou Mobile I need my money today . I booked a plan to East London and if my my trip fails its because of you because I will not have money to book for accommodation and pocket money.