Payments will be made through the mobile operator O2 Slovakia. Customer service: Email: mindplus.sk@silverlines.info . Find the dedicated customer hotline for Slovak Mind+: +421313215999. Brain training tailored for you. I agree to future direct debit payments in favor of the mentioned service provider without the need to authorize each of my payments, by adding the charge to my invoice/deducting from my credit with the Mobile Operator under these terms.