Santander

im not happy

Back in 2010 i put in a check at your bank santander
then received a letter that i was overdrawn so i paid back feb 2011 .
but when i went back to get my money there wont give me my money why?
i paid the overdrawn payment so why this. I was a victim i was scamed you wasnt as i paid your money. as you said you wont never give my money over £ 4,000..
Asking me to give proof that where the cheak came from bt i havent i shown them that i did pay back £ 1,200 took my id's aswel so now what???