ISA Limit Error

Hi all, I've made a bit of a mistake. I have used my £20k personal allowance in a cash ISA, I then went to make a trade for some shares but needed to top up my account, thinking I was topping up my general investment account but I actually topped up and traded on my stocks and shares ISA (who is a different provider to my cash ISA) so am £33.18 over. I did this in July but have only just noticed my idiocy, any help or advice please? Thanks

Hi,
As the amount is so small, it is unlikely a large amount of interest would be generated to be charged outside the ISA protection.
Thank you.