How do i contact dci customer service? Reach us by email any time at [email protected]. We'll do our best to respond as quickly as possible.Who is dci credit services? Put DCI Credit Services, Inc. to work for you today. DCI Credit Services is a locally owned collection agency that has been in the collection and check recovery business since August of 1958.How do i contact sdci? Website: Email our SDCI Web Team. Send us a question: You can also send us a building permit, land use, or zoning question or a rental registration question.How do i contact gci customer service? Customer Service is a top priority at GCI. We want to hear about your experiences good and not-so-good. If you’d like to talk to us about your service or billing, you may use any of the following methods: GCI, Attn: Customer Service, 2550 Denali Street, Suite 1000 Anchorage, AK 99503.