Jcopenglish not delete card data. How delete my own card data?

[robroy]

I have a anonymous prepaid card and i would like delete data to clone others dump here, in fact since these cards say "no id required" instead of the fist/lastname and are already printed, I'm thinking of buying a few for all my future dumps (fu*k j2a080 blank cards errors..)
So, I deleted and formated this prepaid card with SDA emv chip writer by paws (also i tried with jcopenglish), then I writed from X2 a dump but this card still is showing all the old previous data when i read card with cardpeek
How can I totally delete my card data to be able to use this card to write my dumps?