I submitted a paper to a journal in Mathematics. From last 3 and a half months, the status of the article is with editor. I sent a mail to the editorial office to update the status. They replied me saying they will ask the handling editor to contact me. After one more month I asked to expedite the process. No reply. Now from last 3 and half months there is no change in the process. Is it better to withdraw the article or wait for some more time. Thanks for the reply.