Can I claim VAT input even though I haven't charged VAT output?

My PTY(LTD) voluntarily registered for VAT, However I have not being charging vat on the supplies my company makes and have not issued valid tax invoices for the supplies made. Can I still claim the input VAT from expenses incurred even though I have not charged VAT on my taxable supplies?

No as you need to charge VAT on these supplies and pay that over to SARS as you are VAT registered.