Phone number not receiving

I have a contact form setup but I am not receiving telephone numbers entered in the form . Any help would be appreciated !
https://zebo.io/contact/

Phone numbers in my country are shorter than 10 so I’ve put a min
This is my code
<p>Name<span style=”color:#f00;”>*</span><br />
[text* your-name] </p>

<p>Email<span style=”color:#f00;”>*</span><br />
[email* your-email] </p>

<p>Contact number <span style=”color:#f00;”>*</span><br /> [tel* min:8 max:20 Contactnumber]

<p>Business name <span style=”color:#f00;”>*</span><br />
[text* your-business]</p>

<p> Any additional information you would like us to know
[text your-additionalinfo] </p>

<span style=”color:#e52810;”></span> [submit “Send”]