2nd Claim on same Acc' succesful with Barclays!

sneak

i made a claim for £90 worth of bank charges back off barclays recently after they charged me 3x£30 charges for going overdrawn on my account which has no overdraft by £430 through outright dumbass spending spree.
in the time of me puttin in the claim i recieved another 2 charges bringing the total to £150!

i had already made a claim for charges back totaling £120 previously about 6-7 months ago so i was unsure if this claim would be succesful.

it was and i recieved the £90 i had asked for along with a letter. it was mostly gibberish like it was previously but it stated:

"...However as a goodwill gesture i have refunded the £90 into your account today."

and then it had this little bit added that i havent seen before and it wasnt on the previous letter:

"...Please be advised that no further refunds will be given unless a Bank Error occurs."

I still want to ask for the other £60 back do you think they will give it me? They keep a complaint file open for 8 weeks incase of anymore problems so am going to send another letter requesting the other £60 they slyly added on during the process...