A customer ( an Austrian consulting company) ordered a 4 pages report from me last week. We discussed the delivery deadline on Monday and I provided the report and sent it to the customer. We also discussed on the phone last Friday, we will discuss if any corrections will be necessary or not. After I sent the report I called the customer, but the number was not available anymore. I wrote to the contact on Fiverr, who sent me a reply and told me he forwarded the report to the Business Director. When I tried to reach him on WhatsApp, I noticed I was blocked there too. What can I do now?