Inconvenience and totally disappointing

I wished to purchase 2 items online. I registered via Game online on the 26/11/2019. i chose my items, however i did not checkout as i was awaiting my salary. i did see the offer ends 28/11/2019. today when i go to pay, the item has been cleared from my basket. i called the call center to query (***), they say i have to go in-store to purchase. this is a big inconvenience as i work 6 days a week and finish late, also i do not have my own vehicle. i feel that if the item is not available online it should not be there.