Web development

Hi I have a draft website at. I was signed up with a wordpress personal account yet I cancelled as a person saidnhw would rebuild my website and then mutilated it and antagonize about it endlessly with errors, then proceeded to add original bits after endless messaging exchange. He took over hosting the page , his name PetHouse UK and i gave him my godaddy domain password, WordPress website password, and facebook password. All of which I have changed. However he is not wanting to refund my full money and I am concerned that he may be able to hack my acts now. He is the current website host, and I want to either go back to WordPress or find a low cost host via you. I wanted to use the above website format and I wanted help to SEO optimize and be able to add videos. I bought a godaddy 2 year domain on April 19 for 2 yrs, which I can transfer after 60 days if need be and need a newbie user friendly host. I bought a [login to view URL] personal account around 20 April for 1 year which cost £36. I wanted SEO optimize it though and add videos directly which it wanted me to spend more to upgrade. See site: [login to view URL] If I transfer back to WordPress can that chap hack my acts or domains even though I changed password