OneCart help desk failure

Both my father and I have been using OneCart during lockdown and have been very impressed with their service. Until orders on 13 April 2020. For some reason this day, the order-admin side of things went awry. For some reason we both have not received our completed order list, showing what was ordered/not available/replaced with showing the amount due in credit. My father has tried calling and emailing repeatedly but to date has still had to response. He also needs to update the email address listed for him and the system doesn't allow for this. Whilst I think this is a great service during out Lockdown period, I think they need to urgently attend to their help desk side of the business. This is essential, when it is a business that requires a credit card facility for payment (and payment adjustments). One absolutely needs to be able to successfully resolve monetary queries when they arise. Please can someone contact me urgently. Thank you.