Sorry you had the short end of the stick for all those purchases.
The worst I've ever experienced was purchasing a supposedly grafted Kent and Dot mango off eBay. After spending more than these very common varieties are actually worth (1 gal pots), I opened the box to what looks like random seedling mango trees. Seller response was "I guarantee that they are grafted varieties. As for the lack of a graft line or scar, they were grafted at a very young age." Since grafted varieties can take up to 2 years to fruit, who knows if I have misplaced my trust in that seller.... I honestly could not find a graft line at all..... But I'll wait and see.. My window of hope closes after about another 1 yr. 9 mos. more...
That is the last time I'll ever do that.