Clicks deals not working- staff hang up during call without assisting

Clicks offers clubcard deal rewards stating R150 off your purchase of R1000 or more. with an expiry date of 25 Nov 2020. The deal doesn't load onto the clubcard after the effort of downloading the app etc. Called the call centre for help. Staff member, Chelsea says technical difficulties. Only option is that my father of 72 go INTO the store to get a voucher for this deal app****- I said that is not an option IN THE MIDDLE OF A PANDEMIC! besides, some of the items are online only promotions. She doesnt have a solution. Refuses to put me through to a manager - whom I expect to load the R150 cash-back or voucher onto this profile for a future purchase. She hangs up. I expect someone to contact me immediately and to have voucher loaded onto my dad's profile for him to use with another purchase. "We don't know how to fix the issue and management has not provided a solution yet" is a cop out and "*****s" so-called "rewards" Clicks is claiming to offer clients.