[Company address]
[date]
Acc no: [number]
Dear Sir
Due to the recent problems we have had with our account, I have cancelled our current direct debit payment to you.
Please would you send a new direct debit mandate to us for the amount of [amount] per month?
Our mortgage payment usually goes out on the [day] of each month so in order for this month’s to go out on time, please send the mandate out as soon as possible.
Thank you,
[name]