I have repeatedly been charged interest on the zero card though i have always paid promptly and never exceeded my limit. Though the sums are not vast, multiplied by all who use this card and do not detect this extra cost Santander are making a huge, illicit profit. I raised this by phone with santander twice and was met with rudeness and indifference. I wrote to them a month ago and have received no reply.Do check your santander statements very carefully.9397b read full review »