A DCS customer came to us with a billing complaint. Can we resolve it directly?

Please don't - redirect them to DCS instead. Invoicing and contract queries are DCS's responsibility. Attempting to resolve them without the full picture can create inconsistencies and, more importantly, do not share any details of the B2B commercial arrangement between DCS and your organisation - not pricing, not tariff structure or component info, not terms. Sharing such information, even with good intentions, can create billing ambiguities and compliance issues. DCS may recover any costs resulting from such disclosures.