i have filled a form on line
Yes. You need to write to the Court, which is Northampton quoting the claim number and say that you wish to discontinue the claim. Their address is:
Northampton County Court Bulk Centre
4th Floor, St Katharine's House, 21-27 St Katharine's St, Northampton NN1 2LH
Can I clarify anything for you about this today please?