What is the contact information for cardholder account inquiries? Stilt Team Updated December 27, 2020 12:31 Follow Bank services are provided through our banking software provider, Synapse. To report a complaint relating to bank services, email help@Synapsefi.com or call (415) 688-2943. Related articles How to cancel bank transactions? What's transaction limits for Stilt account? How do I apply for a loan with Stilt? How to close Stilt Account? How do I make a payment? Comments 0 comments Please sign in to leave a comment.