Why is it taking so long to get my return?

First, double check to be sure the tax return was received and accepted by the tax agency:
<a rel="nofollow" target="_blank" href="https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp">https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp</a>

If the tax return has been accepted, verify the federal refund status here:
<a rel="nofollow" target="_blank" href="http://www.irs.gov/refunds">www.irs.gov/refunds</a>
State refund status here:
<a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund">https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund</a>

I’ve checked that and it’s been accepted and is still being processed, this happened with last years return and I never received it

You never got the prior refund? Could you have told the IRS to apply it towards the following year's taxes?

Call the IRS:  1-800-829-1040  hours 7 AM - 7 PM local time Monday-Friday

When calling the IRS do NOT choose the first option re: "Refund", or it will send you to an automated phone line.  

So after first choosing your language, then do NOT choose Option 1 (refund info).  Choose option 2 for "personal income tax" instead.

Then press 1 for "form, tax history, or payment".   

Then press 3 "for all other questions."

Then press 2 "for all other questions." 

- When it asks you to enter your SSN or EIN to access your account information, don’t enter anything.  

- After it asks twice, you will get another menu.

Then press 2 for personal or individual tax questions.

It should then transfer you to an agent.