Thank you for your response.
If you have been paying for the number and the account was current, then Sprint is in breach of contract
and had no right to give the number to anyone else and is liable for returning the number to you and the damages they have caused you in breaching their contract
You are going to have to calculate your damages and your business losses resulting from the change of number as best you can do (using prior month's and year's sales to make estimates or statements and testimony
You need to start by making a written demand on Sprint outlining the issue, the fact you had a contract for service, the length of time you had the number, where it is used for your business (web, business cards, advertisement etc) and then describe the damage their negligence in giving your number to someone else has caused and demand they return your number to you and compensate you for your losses caused by their negligence in breaching the contract.
If Sprint refuses to settle this matter, you would have to use a consumer protection or general litigation
attorney and file suit against them for their breach and the damages they have caused.
Thank you so much for using JustAnswer.com. I truly aim to please you as a customer, but please keep in mind that I do not know what you already know or don't know, or with what you need help, unless you tell me. If I did not answer the question you thought you were asking, please respond with the specific question you wanted answered. PLEASE use REPLY to EXPERT if you would like more information or if you feel something was not included in your answer.
Kindly remember the ONLY WAY experts receive any credit at all for spending time with customers is if you click on OK, GOOD or EXCELLENT SERVICE even though you have made a deposit or are a subscription customer. YOU MUST COMPLETE THE RATING FOR THE EXPERT TO RECEIVE ANY CREDIT, if not the site keeps your money on deposit.
Also remember, sometimes the law does not support what we want it to support, but that is not the fault of the person answering the question, so please be courteous.
PLEASE NOTE WELL WE ARE DEALING WITH LAWS OF 50 STATES PLUS FEDERAL LAWS, AS WELL AS DEALING WITH OTHER CUSTOMERS, SO PLEASE BE PATIENT AND BE ASSURED YOU ARE NOT BEING IGNORED.
There can also be a delay of an hour or more in between my answers because I may be taking a break.
You can always request me through my profile at http://www.justanswer.com/law/expert-paulmjd/ or beginning your question with “For PaulMJD…”