I'd go for Ashley Young, he's been good for me with Villa so far, made 8 assists in 11 Games and 7 Goals in the same space of time, great player for me and you could probably pick him up for around £15 Million I would've thought. Or you could play Aguero as an AMC and stick Forlan up front...
If you have accepted the terms to the contracted and 'signed' then you are set to be under contract with Inter by the end of the season and therefore can't go back. Sorry Pal.