Questions refer to the following article。
Due to a recent increase in administrative errors, we are writing to remind you of the process for investigating any suspected discrepancy on your service bill.Please contact the customer service department in writing within 60 days of receiving the bill.In order to avoid fate fees and possible ____19____ of your service, you must still pay undisputed portions of the statement by the due date。
Proteus Sat ____20____ every effort to resolve any claims in a timely manner, and to the mutual satisfaction。
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