Samsung — A31 Samsung charging issues

Dear sir/madam, pThis is to state that myself Ashish GOYAL purchased new Samsung a31 last year but from beginning this mobile phone had charging issues it stopped charging, I gave this phone to many times to service centre at kirti nagar but according to them phone starts charging after two days may be automatically, and they forced me to take it back again and again, now what do I do, I have secret data of me and my family, which may be used by anyone in such kind of problem, now I am highly Disturbed, bcoz it is not working, please do the needful as soon as possible yours truly AshishGoyal [protected]/[protected]