Complain (Disappointed)

Good Afternoon, Yesterday I was called by a men called "Mpho Kekana" from a cell number: ***, told me that I have been selected as once of the Winners for Vodacom Shake Shake, price where: R25,000, Samsung Galaxy S9 and R1500 grocery voucher from Pick and Pay, then he told me that I am short of point to get my price asked me to purchase airtime to the number: *** of R110.00, after doing that, then told me to get my Standard bank Instant pin I need to donate to an NGO and amount of R1250 that will be refunded for me to get my full pin, I send the money via my banking app Absa cash send then got the pin, but said must wait for him to call me in the morning to finalize my price and to which branch manager to consult at Chris Hani Mall in Vosloorus. When he took long to get back to me I immediately went to Standard bank and they confirmed that was a ****. Vodacom I have been a loyal customer for years but now how are we suppose to trust small things as competition if our money is just going to be taken like that? Very disappointed and thinking of changing networks!!!!! Regards,