Why can i not claim bank charges over the six year period ,?

Tsb hammered me for years with bank charges and lack of care . when i complained they ignored me and told me to manage my account better this forced me to change banks. now i believe this may have been ilegal ?? is it possible to reclaim these charges even though i am over the six year period . thank you , mjr
Answer
Not sure, have a look on www.moneysavingexpert.com