Dog and cat supplies (The Esplanade)

So it turns out the new dog i got this weekend has severe separation anxiety issues and wont let me leave him for even short periods. We are trying to socialize him with my two cats slowly so their being kept in a bedroom temporarily with litter and food/water and some toys. We are on day four today and are starting to let the dog (Blue Panda) see the cats (Ray Charles Panda who is half blind, and Onyx Panda, yes all our family are pandas) through the solarium door to get a sense of them without any danger risk like my socialization tips suggested. Short story long, I am living at home with my 9 year old son as well, I cannot leave him here with the pets to get supplies. I cannot leave the dog here alone this early in our Adjustment (I tried and it ended up terribly just walking up the street to pick my son up from school without him yesterday). I am dire need of Cat litter, Dog and cat food (dry for dog, both for cats), and the one i got the dog from he didn't have toys for him so if anyone has any to spare it might help with distraction in the future to be able to run some errands. Please please please tell me someone is able to help us out today. Im supposed to be getting a few dog supplies on Thursday from someone that replied to earlier post but that was before I knew I literally cant leave the dog for any amount of time alone and cant pick up stuff myself. Also was not completely out of cat stuff at that time. I cant wait til I have him fully trained to be home so I won't need to feel like such a terrible pet mama 😩 TIA from The Panda family