im a keycutter amoungst other things get this scenario:

lady comesin ''you cut this key for me yesterday it doesnt work''

i cut her a new one.

lady says ''wheres the old one i want it i dont want u following me home and breaking in.

i say ''lady you said the key doesnt work so how can i?''

lady says ''dont be rude to me or ill phone your head office and complain''

i say ''look heres 20p theres the head office number and theres a phone box call sumone who cares''

lol also sum slag wanted to complain because i wouldnt let her in the shop 1 hour after closing time. do u get that? cos i dont. your sounds worse thou