Réponse:
Ligne 1: Who were ➡ which was
Ligne 3: I graduate ➡ I graduated, I has ➡ I have
Ligne 4: Four years experience of working ➡ Four years of experience, working
Ligne 5: In costumer services in company ➡ In the costumer services of a company
Ligne 7: For deal ➡ To deal
Ligne 9: I would like develop my proffessional skills ➡ I would like to develop my professional skills
Ligne 10: I am interesting ➡ I am interested, For improve ➡ To improve
Et le dernier paragraphe y'a rien qui va.
N'oublie pas que devant un verbe à l'infinitif on utilise ''to'' et non ''for''.