Sub: Tel nos.: 0000 & 0000– Service rental charges cancellationDear Sir/ Madam,This is to request to your good office that to cancel service rental charges to above mention tel. numbers being charge for (a) numeric display paging service (b) First Del Business (c) Numeric display paging service and as followsKindly, please do the needful at your earliest
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Subject: Tel nos. 0000 & 0000– Service rental charges cancellation

Dear Sir or Madam,

This is to request the cancellation of service rental charges for the above-mentioned telephone numbers, being charges for numeric display paging service and First Del business.

Thank you for your prompt attention to this matter.

(signed)
be more precise, no one knows here as to why you want to cancel the telephone charges, i.e. does your company has been charged on the same bill? or your company is not responsible to pay or maybe you have to refer to the previous agreement

let me know

jay