I am made to pay some more money for a pot repkacement

I bought the pots from them and the other one was chipped,i call the agent who directed me to their customer service with no sympathy or understanding of my problem,upon realisation that it will be my waste of time i left it,a month after i bought them another agent called to check if am happy with my order,i explained my problem and she said she will log a call for me and call back,but she never called.then another agent called to sell me the other pots then i related my story to her,then she logged a call for me,while my request was attended they told me i must pay more money for them to replace the pot,