Twilight Children are ungrateful

My partner and I got married in 2015. Instead of gifts we asked our guests to join us in making a donation to Twilight Children in Hillbrow. We did our due diligence by physically visiting the centre to find out their needs. We donated R15 000 in total to Twilight Children. We had no reply from the organisation. We received confirmation from the bank that the money was transferred to their account. After numerous emails and calls to Mr Matshili, we had received no reply or a simple thank you note. These people are just ungrateful! I wish we had spent this money on a more engaging and grateful charity!