Dont pay back my money

Ive purchase a bosh fridge thru teljoy after a while it just stop working. Ive contacted them cause the fridge is still under warrantee. After 2 weeks a technician from biss came out and fixed the fridge but then i had to pay him on the spot. Not sure why. Ive brought it under teljoys attention and they told me they will refund me with in 7days cause of the reason that the fridge is still under warrantee. Ive sent the invoice everything thru. Kate or katie were the one assiting me regarding the repayment. Till now ive not reseived anything. And when i sent emails thru to Katie or kate it get ignored. So please just pay me back my money you owe me asap cause i dont have money and still you are taking everything that belong to you but i must wait.