Good day to all

I have a hypothetical question regarding the sales to a non-VAT Vendor company with my company being a VAT Vendor.

My question is as follows:
I have sold inventory to a company on credit where there is no VAT number on the credit invoice, to my fairly little knowledge on VAT, this means that this company is not a VAT Vendor, or this company's invoice is insufficient, but my question is based on the company I am selling to is not a VAT Vendor. On the invoice, VAT @ 15% has been charged and added to the total with no VAT number from the client I am selling to on the invoice. To my knowledge if a non-VAT Vendor pays VAT, it cannot be claimed from SARS, but a VAT Vendor can claim the VAT that was paid.

Can anyone please advise me what would be done in the general journal regarding VAT Output in this situation where the client is not a VAT vendor? Should there be VAT charged? Should there no VAT be charged and the products only be sold on selling price excluding VAT @ 15%? I am quit new Tax and some of the things I have read are not clear on this.

Thanks in advance.