bristow and sutor enforcement notice

[mr gally]

hi got home tonight and found a letter stuck through my door of notification of enforcement agent visit for £390 and includes an enforcement stage fee of £235 ,on calling up the office of bristow and sutor as i have the delight of only living across the road from there offices lol was fobbed of by one of there arrogant staff that i had defaulted on my payment plan on the 24 /4 /15 so i was liable to pay the £235, on checking my records the final payment was processed the same day and also that i had over payed by £49 would i be able to charge them £75 for a letter as they are able to me as there at fault?