Done! Thanks for the help, well see what happens I guess

I used 4 mythic wild cards that I spent $20 getting on the old art for Phyrexian Obliterator and then used 4,000 coins to purchase the black/white MoM alternate art without realizing that I need to have the basic MoM printing to use it on. I either want my $20 back or want to have my 4x old art Phyrexian Obliterators replaced with 4x MoM copies. It is not made clear at all how this works and this is unacceptable.

Try going to https://mtgarena-support.wizards.com/hc/en-us/requests/new/ and ask under general questions if they could swap which set version you have or if they could refund or something

I used 4 mythic wild cards that I spent $20 getting on the old art for Phyrexian Obliterator and then used 4,000 coins to purchase the black/white MoM alternate art without realizing that I need to have the basic MoM printing to use it on. I either want my $20 back or want to have my 4x old art Phyrexian Obliterators replaced with 4x MoM copies. It is not made clear at all how this works and this is unacceptable.

I used 4 mythic wild cards that I spent $20 getting on the old art for Phyrexian Obliterator and then used 4,000 coins to purchase the black/white MoM alternate art without realizing that I need to have the basic MoM printing to use it on. I either want my $20 back or want to have my 4x old art Phyrexian Obliterators replaced with 4x MoM copies. It is not made clear at all how this works and this is unacceptable.

I used 4 mythic wild cards that I spent $20 getting on the old art for Phyrexian Obliterator and then used 4,000 coins to purchase the black/white MoM alternate art without realizing that I need to have the basic MoM printing to use it on. I either want my $20 back or want to have my 4x old art Phyrexian Obliterators replaced with 4x MoM copies. It is not made clear at all how this works and this is unacceptable.

I used 4 mythic wild cards that I spent $20 getting on the old art for Phyrexian Obliterator and then used 4,000 coins to purchase the black/white MoM alternate art without realizing that I need to have the basic MoM printing to use it on. I either want my $20 back or want to have my 4x old art Phyrexian Obliterators replaced with 4x MoM copies. It is not made clear at all how this works and this is unacceptable.