No Reply - Company does not have a contact no. besides what's app

After applying online for a vehicle rental, I was pre-approved then an sms was sent requesting my personal documents ID, Drivers Licence, Bank Statement, Proof of Residence, so I emailed the next morning which was the 18/11/2021. The company does not have a telephone number on the website. They send you a what's app number on the pre-approval sms. The what's app number seems to only be an automated number. So this company has all my personal information but, I cannot contact them back. The only contact is an automated what's app number which states thank you for contacting us we are experiencing high volumes of applications and are experiencing system issues, we will contact you as soon as possible. Till now no response.