Donor

Hi everyone. In October last year I have bought Honda CBF125, previously C category. Everything was fine. I have used it everyday since then. Been doing about 12 miles a day going to work and back home. Couple weeks ago my rear wheel start to be noisy and it was difficult to spin it around. Today I have tried to fix it unfortunately I could not take the wheel off. All I could do is remove rear brake and loose it up so now wheel is spinning ok. I have noticed that chain is too loose as well, but I can't adjust it more than it is now. Does anyone know good motorcycle repair & service around Wigan? My knowledge is poor, I have got haynes manual but I am worried I can damage something. Thanks in advance for any help. English is not my native language so I apologize for any mistakes.